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g1t/apps/api/src/tools.rs

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1//! The MCP server's tools: a few resource tools, each with an `action`.
2//!
3//! Every operation is one action of one tool. A call is dispatched to the
4//! operation it names, so permissions, the audit log, billing and outcomes
5//! are exactly those of the REST API. A token sees only the actions its
6//! scopes allow, and a tool none of whose actions it may use is not listed.
7//!
8//! The listed input schema is one flat object: `action`, then every field
9//! any of its actions takes. Which fields each action needs is in the
10//! `action` field's description and checked on every call. Claude's API,
11//! and so most MCP clients, refuse a tool whose input schema has `oneOf`
12//! at its top level, so the schema keyed by action, with each action's
13//! required fields, is [`discriminated`], published on the server's card
14//! and in the docs.
15
16use g1t_contracts::credentials::NEVER;
17use g1t_contracts::identity::AgentScope;
18use g1t_contracts::scopes::{Level, NO_SCOPE, TokenAccess, scope_for};
19use serde_json::{Map, Value, json};
20
21use crate::operations::Op;
22use crate::rules::RulesOp;
23use crate::security::SecurityOp;
24
25pub struct Action {
26 pub name: &'static str,
27 pub op: Op,
28 /// One line, for the `action` field's description.
29 pub summary: &'static str,
30}
31
32pub struct Tool {
33 pub name: &'static str,
34 pub title: &'static str,
35 /// What it is for, in a sentence or two.
36 pub description: &'static str,
37 pub actions: &'static [Action],
38 /// The action a call without one runs.
39 pub default_action: Option<&'static str>,
40}
41
42const fn a(name: &'static str, op: Op, summary: &'static str) -> Action {
43 Action { name, op, summary }
44}
45
46pub const TOOLS: &[Tool] = &[
47 Tool {
48 name: "search",
49 title: "Search",
50 description: "Find things. `code` (the default) searches all of g1t you can see: repositories, code, issues, pull requests and people, with qualifiers like repo:owner/name, language:rust, is:issue. `context` searches one workspace's catalog, docs, issues and memory by meaning.",
51 default_action: Some("code"),
52 actions: &[
53 a("code", Op::Search, "Search all of g1t: repositories, code, issues, pull requests, people"),
54 a("context", Op::SearchContext, "Search a workspace's context hub by meaning"),
55 a("entity", Op::GetEntity, "One catalog entry and its relations"),
56 a("ticket", Op::GetContext, "A Jira, Linear or Sentry item the work refers to, as it is now"),
57 ],
58 },
59 Tool {
60 name: "repository",
61 title: "Repositories",
62 description: "Repositories: find, read and create them, change their settings and rulesets (what may happen to branches and tags, and what a pull request needs to merge), check their CODEOWNERS file, manage their labels and milestones, and see and dismiss their security alerts (secrets and vulnerable dependencies). Name one as \"owner/name\". Deleting, transferring and changing visibility need `confirm`.",
63 default_action: None,
64 actions: &[
65 a("list", Op::ListRepos, "Repositories you can see"),
66 a("get", Op::GetRepo, "One repository"),
67 a("create", Op::CreateRepo, "Create one, empty or copied from a public git URL"),
68 a("update", Op::UpdateRepo, "Change description, website, topics, default branch, protection"),
69 a("get_settings", Op::GetRepoSettings, "How pull requests merge, and the default branch's protection as its rules stack"),
70 a("update_settings", Op::UpdateRepoSettings, "Change how pull requests merge and the default branch protection ruleset"),
71 a("check_names", Op::ListCheckNames, "Check names reported lately, to require in a ruleset"),
72 a("list_rulesets", Op::Rules(RulesOp::ListRepoRulesets), "Its rulesets, and its workspace's that hold in it"),
73 a("get_ruleset", Op::Rules(RulesOp::GetRepoRuleset), "One ruleset"),
74 a("create_ruleset", Op::Rules(RulesOp::CreateRepoRuleset), "Create a ruleset for its branches or tags"),
75 a("update_ruleset", Op::Rules(RulesOp::UpdateRepoRuleset), "Change a ruleset"),
76 a("delete_ruleset", Op::Rules(RulesOp::DeleteRepoRuleset), "Delete a ruleset"),
77 a("branch_rules", Op::Rules(RulesOp::GetBranchRules), "Every rule that holds for a branch or tag, and where it comes from"),
78 a("rule_evaluations", Op::Rules(RulesOp::ListRuleEvaluations), "How its rules judged pushes and merges, with insights"),
79 a("codeowners", Op::GetCodeownersErrors, "Problems in its CODEOWNERS file, by line"),
80 a("list_labels", Op::ListLabels, "Labels, with colors and how many issues and pull requests carry each"),
81 a("create_label", Op::CreateLabel, "Create a label"),
82 a("update_label", Op::UpdateLabel, "Rename a label or change its color or description"),
83 a("delete_label", Op::DeleteLabel, "Delete a label, from everything that carries it"),
84 a("add_default_labels", Op::AddDefaultLabels, "Add the default labels it is missing"),
85 a("list_milestones", Op::ListMilestones, "Milestones, with progress and due dates"),
86 a("get_milestone", Op::GetMilestone, "One milestone with its issues and pull requests"),
87 a("create_milestone", Op::CreateMilestone, "Create a milestone"),
88 a("update_milestone", Op::UpdateMilestone, "Change a milestone's title, description, due date or state"),
89 a("delete_milestone", Op::DeleteMilestone, "Delete a milestone"),
90 a("list_events", Op::ListEvents, "Timeline: pushes, issues, pull requests, comments"),
91 a("rename_branch", Op::RenameBranch, "Rename a branch"),
92 a("rename", Op::RenameRepo, "Rename it; old addresses redirect"),
93 a("transfer", Op::TransferRepo, "Move it to another workspace you own"),
94 a("archive", Op::ArchiveRepo, "Make it read-only"),
95 a("unarchive", Op::UnarchiveRepo, "Make it writable again"),
96 a("set_visibility", Op::SetRepoVisibility, "Make it public or private"),
97 a("delete", Op::DeleteRepo, "Delete it; restorable for 30 days"),
98 a("list_deleted", Op::ListDeletedRepos, "A workspace's deleted repositories"),
99 a("restore", Op::RestoreRepo, "Restore a deleted one"),
100 a("purge", Op::PurgeRepo, "Remove a deleted one for good"),
101 a("security_alerts", Op::ListSecurityAlerts, "Secret and dependency alerts, filtered by state"),
102 a("dismiss_alert", Op::DismissSecurityAlert, "Dismiss an alert with a reason"),
103 a("reopen_alert", Op::ReopenSecurityAlert, "Reopen a dismissed alert"),
104 ],
105 },
106 Tool {
107 name: "issue",
108 title: "Issues",
109 description: "Issues: what should change. Read one before working on it to see the pull requests already made for it. Issues and pull requests share numbers; `comment` works on either.",
110 default_action: None,
111 actions: &[
112 a("list", Op::ListIssues, "Issues on a repository, newest first"),
113 a("get", Op::GetIssue, "One issue with comments and its pull requests"),
114 a("create", Op::CreateIssue, "Open an issue"),
115 a("update", Op::UpdateIssue, "Change title, body, labels, milestone or assignees"),
116 a("labels", Op::ListIssueLabels, "The labels an issue or pull request carries"),
117 a("add_labels", Op::AddIssueLabels, "Add labels to an issue or pull request"),
118 a("set_labels", Op::SetIssueLabels, "Replace the labels of an issue or pull request"),
119 a("remove_labels", Op::RemoveIssueLabels, "Take labels off an issue or pull request"),
120 a("close", Op::CloseIssue, "Close it without a pull request"),
121 a("reopen", Op::ReopenIssue, "Reopen it"),
122 a("comment", Op::AddComment, "Comment on an issue or pull request; path and line for one line of a change"),
123 a("import", Op::ImportIssue, "Open an issue from a Jira, Linear or Sentry item"),
124 ],
125 },
126 Tool {
127 name: "pull_request",
128 title: "Pull requests",
129 description: "Pull requests: start a change for an issue, record your session, mark it ready, ask people and teams to review, review and merge. Read `overlaps` and `behind` on `get` before going far, and `code_owners` for whose approval it needs.",
130 default_action: None,
131 actions: &[
132 a("list", Op::ListPullRequests, "Pull requests on a repository, newest first"),
133 a("get", Op::GetPullRequest, "Status, checks and required checks, reviews, overlaps, whether it is behind"),
134 a("changes", Op::GetPullRequestChanges, "Files and line-by-line diff"),
135 a("create", Op::CreatePullRequest, "Start a draft with its own fork to push to, or open one from a pushed branch"),
136 a("update", Op::UpdatePullRequest, "Change its base branch, labels, milestone, assignees or reviewers"),
137 a("record_session", Op::RecordSession, "Append prompt, reasoning and tool entries to its session"),
138 a("read_session", Op::ReadSession, "Its recorded session"),
139 a("ready", Op::MarkPullRequestReady, "Mark a draft ready, with a summary"),
140 a("request_reviewers", Op::RequestReviewers, "Ask people or teams to review it"),
141 a("remove_requested_reviewers", Op::RemoveRequestedReviewers, "Stop asking people or teams to review it"),
142 a("review", Op::ReviewPullRequest, "Approve or request changes"),
143 a("close", Op::ClosePullRequest, "Close without merging"),
144 a("merge", Op::MergePullRequest, "Land it, or join the merge queue"),
145 a("merge_queue", Op::GetMergeQueue, "The repository's merge queue"),
146 ],
147 },
148 Tool {
149 name: "agent",
150 title: "g1t agents",
151 description: "Put g1t's agent to work and talk to it. One agent per issue; to do more at once, use more issues. Starting an agent uses the workspace's money.",
152 default_action: None,
153 actions: &[
154 a("delegate", Op::Delegate, "Open an issue and put an agent on it in one step"),
155 a("assign", Op::AssignIssue, "Put an agent on an existing issue"),
156 a("message", Op::MessageAgent, "Tell the agent on a pull request something, or ask another agent"),
157 a("answer", Op::AnswerMessage, "Answer a question or handoff sent to you"),
158 a("take_messages", Op::TakeMessages, "For a g1t agent: messages not seen yet"),
159 ],
160 },
161 Tool {
162 name: "plan",
163 title: "Plans",
164 description: "Turn an outcome into issues: an agent proposes them with what done means and their dependencies; nothing opens until you apply the plan.",
165 default_action: None,
166 actions: &[
167 a("create", Op::PlanWork, "Ask an agent for a plan; read it with get until ready"),
168 a("get", Op::GetPlan, "A plan and the issues it proposes"),
169 a("apply", Op::ApplyPlan, "Open its issues; with assign, agents start in dependency order"),
170 ],
171 },
172 Tool {
173 name: "memory",
174 title: "Memory",
175 description: "What the project and its workspace remember for the next agent: how to build, conventions, decisions, traps. Recall before you start; remember one short fact at a time, never a secret.",
176 default_action: None,
177 actions: &[
178 a("recall", Op::Recall, "Search memory, or list it all"),
179 a("remember", Op::Remember, "Save one fact"),
180 ],
181 },
182 Tool {
183 name: "workflow",
184 title: "Workflows",
185 description: "GitHub Actions workflows from .g1t/workflows: their runs, jobs and logs, and running, cancelling or rerunning them. Also the self-hosted runners they run on: a workspace's (`workspace`) or a repository's own (`repo`), their groups, and where agent work runs.",
186 default_action: None,
187 actions: &[
188 a("list", Op::ListWorkflows, "Workflows on the default branch"),
189 a("list_runs", Op::ListWorkflowRuns, "Runs, newest first"),
190 a("get_run", Op::GetWorkflowRun, "One run with its jobs and steps"),
191 a("job_logs", Op::GetJobLogs, "A job's log after a sequence number"),
192 a("dispatch", Op::DispatchWorkflow, "Run a workflow_dispatch workflow"),
193 a("cancel", Op::CancelWorkflowRun, "Cancel a run"),
194 a("rerun", Op::RerunWorkflowRun, "Run a finished run again"),
195 a("update", Op::UpdateWorkflow, "Turn a workflow on or off"),
196 a("list_runners", Op::ListRunners, "Self-hosted runners, with status, labels and what each is doing"),
197 a("create_runner_token", Op::CreateRunnerRegistrationToken, "A one-hour token for g1t-runner register"),
198 a("remove_runner", Op::RemoveRunner, "Remove a self-hosted runner"),
199 a("list_runner_groups", Op::ListRunnerGroups, "A workspace's runner groups"),
200 a("create_runner_group", Op::CreateRunnerGroup, "Make a group, for some repositories"),
201 a("update_runner_group", Op::UpdateRunnerGroup, "Rename a group or change its repositories"),
202 a("delete_runner_group", Op::DeleteRunnerGroup, "Delete a group; its runners join the default"),
203 a("get_runner_settings", Op::GetRunnerSettings, "Where agent work runs; whether forks may use runners"),
204 a("update_runner_settings", Op::UpdateRunnerSettings, "Change them"),
205 ],
206 },
207 Tool {
208 name: "secret",
209 title: "Secrets and variables",
210 description: "A repository's or workspace's secrets and variables, read by workflows and deployments. Secret values are never returned.",
211 default_action: None,
212 actions: &[
213 a("list_secrets", Op::ListActionsSecrets, "Secrets, without values"),
214 a("set_secret", Op::SetActionsSecret, "Add or change a secret"),
215 a("delete_secret", Op::DeleteActionsSecret, "Remove a secret"),
216 a("list_variables", Op::ListActionsVariables, "Variables, with values"),
217 a("set_variable", Op::SetActionsVariable, "Add or change a variable"),
218 a("delete_variable", Op::DeleteActionsVariable, "Remove a variable"),
219 ],
220 },
221 Tool {
222 name: "webhook",
223 title: "Webhooks",
224 description: "HTTPS addresses sent signed events as they happen, for a repository or a whole workspace.",
225 default_action: None,
226 actions: &[
227 a("list", Op::ListWebhooks, "Webhooks, without secrets"),
228 a("create", Op::CreateWebhook, "Register one; a ping is sent"),
229 a("update", Op::UpdateWebhook, "Change address, events or active"),
230 a("delete", Op::DeleteWebhook, "Remove one"),
231 a("ping", Op::PingWebhook, "Send a ping"),
232 a("list_deliveries", Op::ListWebhookDeliveries, "Latest deliveries"),
233 a("redeliver", Op::RedeliverWebhook, "Send a delivery again"),
234 ],
235 },
236 Tool {
237 name: "access",
238 title: "Who has access",
239 description: "Who has access to a repository and with which role (read, triage, write, maintain, admin), outside collaborators, and a workspace's base permission.",
240 default_action: None,
241 actions: &[
242 a("list_collaborators", Op::ListCollaborators, "Everyone with a role, and pending invitations"),
243 a("get_permission", Op::GetCollaboratorPermission, "One person's role and capabilities"),
244 a("add_collaborator", Op::AddCollaborator, "Give someone a role, by username or email"),
245 a("update_collaborator", Op::UpdateCollaborator, "Change a direct role"),
246 a("remove_collaborator", Op::RemoveCollaborator, "Take away a direct role"),
247 a("list_invitations", Op::ListRepoInvitations, "Pending invitations to a repository"),
248 a("revoke_invitation", Op::RevokeRepoInvitation, "Withdraw one"),
249 a("set_base_permission", Op::SetBasePermission, "What every member gets on each repository"),
250 a("list_outside_collaborators", Op::ListOutsideCollaborators, "People with roles who are not members"),
251 ],
252 },
253 Tool {
254 name: "team",
255 title: "Teams",
256 description: "Teams: groups of a workspace's members, given roles on repositories together, mentioned as @workspace/team and asked to review together. Name one by `workspace` and its slug (`team`). Any member may create a team; the workspace's owners and the team's maintainers manage it. A secret team is seen only by its people and the owners.",
257 default_action: None,
258 actions: &[
259 a("list", Op::ListTeams, "A workspace's teams you can see"),
260 a("get", Op::GetTeam, "One team"),
261 a("create", Op::CreateTeam, "Create a team; you become its maintainer"),
262 a("update", Op::UpdateTeam, "Change its name, slug, description, visibility, parent or notifications"),
263 a("delete", Op::DeleteTeam, "Delete it; its child teams move up"),
264 a("list_members", Op::ListTeamMembers, "Its people and their roles, child teams' with include_child_teams"),
265 a("set_member", Op::SetTeamMember, "Add a member of the workspace, or change their role"),
266 a("remove_member", Op::RemoveTeamMember, "Take someone out of it"),
267 a("list_child_teams", Op::ListChildTeams, "The teams nested under it"),
268 a("list_repos", Op::ListTeamRepos, "The repositories it has a role on"),
269 a("set_repo", Op::SetTeamRepo, "Give it a role on a repository"),
270 a("remove_repo", Op::RemoveTeamRepo, "Take its role on a repository away"),
271 a("set_review_assignment", Op::SetTeamReviewAssignment, "Whom it picks when asked to review"),
272 a("list_user_teams", Op::ListUserTeams, "The teams someone is in"),
273 ],
274 },
275 Tool {
276 name: "workspace",
277 title: "Workspaces",
278 description: "Workspaces own repositories (g1t.sh/{workspace}/{repo}): create, update or delete one, invite members, connect integrations and model providers, set rulesets that hold across its repositories, and keep your own pinned projects at the top of its sidebar.",
279 default_action: None,
280 actions: &[
281 a("get", Op::GetWorkspace, "A workspace's details and settings"),
282 a("create", Op::CreateWorkspace, "Create a workspace"),
283 a("delete", Op::DeleteWorkspace, "Delete a workspace and everything in it (support can restore it for 30 days)"),
284 a("update", Op::UpdateWorkspace, "Change its name, description, base permission or who may create teams"),
285 a("list_invites", Op::ListWorkspaceInvites, "Its invites"),
286 a("invite_member", Op::InviteMember, "Invite an email address"),
287 a("revoke_invite", Op::RevokeWorkspaceInvite, "Revoke a pending invite"),
288 a("list_integrations", Op::ListIntegrations, "Model providers, alert sources, trackers"),
289 a("connect_integration", Op::ConnectIntegration, "Connect one"),
290 a("disconnect_integration", Op::DisconnectIntegration, "Remove one"),
291 a("test_integration", Op::TestIntegration, "Check its credentials"),
292 a("get_model_routes", Op::GetModelRoutes, "Where each kind of work's model requests go"),
293 a("set_model_routes", Op::SetModelRoutes, "Replace them"),
294 a("list_pinned_projects", Op::ListPinnedProjects, "Your pinned projects in it, in your order"),
295 a("pin_project", Op::PinProject, "Pin a project, at a position or the end"),
296 a("unpin_project", Op::UnpinProject, "Unpin a project"),
297 a("reorder_pinned_projects", Op::ReorderPinnedProjects, "Put your pins in a new order"),
298 a("list_rulesets", Op::Rules(RulesOp::ListWorkspaceRulesets), "Its rulesets, which hold across its repositories"),
299 a("get_ruleset", Op::Rules(RulesOp::GetWorkspaceRuleset), "One of its rulesets"),
300 a("create_ruleset", Op::Rules(RulesOp::CreateWorkspaceRuleset), "Create a ruleset for some or all of its repositories"),
301 a("update_ruleset", Op::Rules(RulesOp::UpdateWorkspaceRuleset), "Change one of its rulesets"),
302 a("delete_ruleset", Op::Rules(RulesOp::DeleteWorkspaceRuleset), "Delete one of its rulesets"),
303 a("rule_evaluations", Op::Rules(RulesOp::ListWorkspaceRuleEvaluations), "How rules judged changes across its repositories"),
304 ],
305 },
306 Tool {
307 name: "billing",
308 title: "Billing",
309 description: "A workspace's billing: its usage by product, project and day, its budget (the monthly spend limit, alerts and whether usage pauses at it), its AI credit, its invoices, and its AI Gateway requests. Amounts are whole millionths of a dollar (`_micros`), or cents (`_cents`) where named. Members read it; changing the budget and buying credit are for owners, as people, and never for g1t's agents.",
310 default_action: Some("usage"),
311 actions: &[
312 a("usage", Op::GetUsage, "Usage over a range of days, by product, meter, project and day, and what paid for it"),
313 a("budget", Op::GetBudget, "The monthly spend limit, what was spent, alerts and whether usage pauses at the limit"),
314 a("set_budget", Op::SetBudget, "Change the spend limit, alerts, pausing or the alert webhook"),
315 a("ai_credit", Op::GetAiCredit, "AI credit left, its grants, auto-reload and how to buy more"),
316 a("buy_ai_credit", Op::BuyAiCredit, "A payment page to buy AI credit, for a person to open"),
317 a("invoices", Op::ListInvoices, "Every invoice, the itemised usage invoices, and the next one so far"),
318 a("billing_details", Op::GetBillingDetails, "Who invoices are made out to and the payment method on file"),
319 a("gateway_requests", Op::ListGatewayRequests, "Recent AI Gateway requests: model, tokens, cost, status and token"),
320 ],
321 },
322 Tool {
323 name: "security",
324 title: "Security",
325 description: "A repository's security: secret scanning alerts and push protection bypasses, custom secret patterns, code scanning alerts and SARIF uploads, vulnerability alerts, the dependency graph and its SBOM, dependency review, settings, and a workspace's overview. Fix an alert with g1t. Findings are shown to those who can change the code only. Give `repo` (owner/name), or `workspace` for lists across one.",
326 default_action: Some("secret_alerts"),
327 actions: &[
328 a("secret_alerts", Op::Security(SecurityOp::ListSecretAlerts), "Secret scanning alerts; by state, secret_type, validity, bypassed"),
329 a("secret_alert", Op::Security(SecurityOp::GetSecretAlert), "One secret alert, with where it was found and its bypass requests"),
330 a("update_secret_alert", Op::Security(SecurityOp::UpdateSecretAlert), "Dismiss a secret alert with a reason, or reopen it"),
331 a("secret_locations", Op::Security(SecurityOp::ListSecretLocations), "Every file, line and commit a secret is in"),
332 a("bypass", Op::Security(SecurityOp::BypassPushProtection), "Push past push protection with a reason, or ask to"),
333 a("check_validity", Op::Security(SecurityOp::CheckSecretValidity), "Ask a secret's issuer whether it still works"),
334 a("bypass_requests", Op::Security(SecurityOp::ListBypassRequests), "A workspace's push protection bypass requests"),
335 a("review_bypass", Op::Security(SecurityOp::ReviewBypassRequest), "Approve, deny or cancel a bypass request"),
336 a("patterns", Op::Security(SecurityOp::ListCustomPatterns), "Custom secret patterns of a repository or workspace"),
337 a("create_pattern", Op::Security(SecurityOp::CreateCustomPattern), "Create a custom secret pattern, as a draft or published"),
338 a("update_pattern", Op::Security(SecurityOp::UpdateCustomPattern), "Change, publish or unpublish a custom pattern"),
339 a("delete_pattern", Op::Security(SecurityOp::DeleteCustomPattern), "Delete a custom pattern"),
340 a("dry_run_pattern", Op::Security(SecurityOp::DryRunCustomPattern), "Run a pattern over the default branch without saving it"),
341 a("code_alerts", Op::Security(SecurityOp::ListCodeAlerts), "Code scanning alerts; by state, severity, tool, rule_id"),
342 a("code_alert", Op::Security(SecurityOp::GetCodeAlert), "One code scanning alert by number"),
343 a("update_code_alert", Op::Security(SecurityOp::UpdateCodeAlert), "Dismiss a code scanning alert with a reason, or reopen it"),
344 a("analyses", Op::Security(SecurityOp::ListAnalyses), "Code scanning analyses, newest first"),
345 a("upload_sarif", Op::Security(SecurityOp::UploadSarif), "Upload a SARIF file, gzipped and base64-encoded"),
346 a("sarif_upload", Op::Security(SecurityOp::GetSarifUpload), "Whether a SARIF upload was read, and its analyses"),
347 a("vulnerability_alerts", Op::Security(SecurityOp::ListVulnerabilityAlerts), "Vulnerable dependencies; by state, severity, ecosystem, package"),
348 a("vulnerability_alert", Op::Security(SecurityOp::GetVulnerabilityAlert), "One vulnerability alert"),
349 a("update_vulnerability_alert", Op::Security(SecurityOp::UpdateVulnerabilityAlert), "Dismiss a vulnerability alert with a reason, or reopen it"),
350 a("fix", Op::Security(SecurityOp::FixAlert), "Put g1t on an issue to fix an alert"),
351 a("dependency_graph", Op::Security(SecurityOp::GetDependencyGraph), "Every package the lockfiles resolve, direct or transitive"),
352 a("sbom", Op::Security(SecurityOp::GetSbom), "The dependency graph as an SPDX 2.3 document"),
353 a("compare_dependencies", Op::Security(SecurityOp::CompareDependencies), "What changes in dependencies between base...head"),
354 a("settings", Op::Security(SecurityOp::GetSettings), "A repository's security settings"),
355 a("update_settings", Op::Security(SecurityOp::UpdateSettings), "Change when checks fail and dependency review's policy"),
356 a("workspace_settings", Op::Security(SecurityOp::GetWorkspaceSettings), "A workspace's delegated bypass and validity checks"),
357 a("update_workspace_settings", Op::Security(SecurityOp::UpdateWorkspaceSettings), "Turn delegated bypass or validity checks on or off"),
358 a("overview", Op::Security(SecurityOp::GetOverview), "A workspace's alerts, trends and coverage"),
359 ],
360 },
361 Tool {
362 name: "notifications",
363 title: "Notifications",
364 description: "Your inbox: what needs you, and what you follow. One thread per issue, pull request, workflow or deployment, with why you were told (`reason`): an agent waiting on you, a review asked of you, an assignment, a mention, your work's checks, or what you subscribe to and watch. Mark threads read or done once handled, and choose what you hear of with subscribe, unsubscribe and watch. Your own: a personal token.",
365 default_action: Some("list"),
366 actions: &[
367 a("list", Op::ListNotifications, "Unread threads, latest first; all, a view, a reason, a repository"),
368 a("get", Op::GetNotificationThread, "One thread with its recent activity and your subscription"),
369 a("mark_read", Op::MarkThreadRead, "Mark a thread read, or unread"),
370 a("mark_all_read", Op::MarkNotificationsRead, "Mark everything read up to a time, or one repository's"),
371 a("done", Op::MarkThreadDone, "Mark a thread done; new activity brings it back"),
372 a("save", Op::SaveThread, "Save a thread, or unsave it"),
373 a("snooze", Op::SnoozeThread, "Snooze a thread until a time, or bring it back"),
374 a("subscription", Op::GetThreadSubscription, "Your subscription to an issue or pull request"),
375 a("subscribe", Op::SetThreadSubscription, "Subscribe to an issue or pull request, or ignore it"),
376 a("unsubscribe", Op::DeleteThreadSubscription, "Unsubscribe until you comment or are mentioned"),
377 a("watching", Op::GetRepoSubscription, "How you watch a repository"),
378 a("watch", Op::SetRepoSubscription, "Watch a repository: participating, all, ignore or custom"),
379 a("unwatch", Op::DeleteRepoSubscription, "Stop watching a repository"),
380 a("watched", Op::ListWatchedRepos, "Repositories you watch other than the default way"),
381 ],
382 },
383 Tool {
384 name: "account",
385 title: "Your account",
386 description: "Who this token acts as and its workspaces (`whoami`), your email addresses, your invites, and invitations to repositories waiting for you.",
387 default_action: Some("whoami"),
388 actions: &[
389 a("whoami", Op::Whoami, "Who the token acts as, and its workspaces"),
390 a("list_emails", Op::ListEmails, "Your addresses"),
391 a("add_email", Op::AddEmail, "Add an address"),
392 a("remove_email", Op::RemoveEmail, "Remove an address"),
393 a("update_email_settings", Op::UpdateEmailSettings, "Primary, backup and privacy"),
394 a("list_invites", Op::ListInvites, "Your invites to g1t"),
395 a("create_invite", Op::CreateInvite, "Make an invite"),
396 a("revoke_invite", Op::RevokeInvite, "Revoke one"),
397 a("list_repository_invitations", Op::ListMyRepoInvitations, "Invitations to repositories for you"),
398 a("accept_repository_invitation", Op::AcceptRepoInvitation, "Accept one"),
399 a("decline_repository_invitation", Op::DeclineRepoInvitation, "Decline one"),
400 ],
401 },
402];
403
404/// Operations that cannot be undone, or reach beyond g1t's own records:
405/// clients ask before running a tool that has any of them.
406fn destructive(op: Op) -> bool {
407 matches!(
408 op,
409 Op::Security(SecurityOp::DeleteCustomPattern | SecurityOp::BypassPushProtection)
410 | Op::Rules(RulesOp::DeleteRepoRuleset | RulesOp::DeleteWorkspaceRuleset)
411 | Op::DeleteWorkspace
412 | Op::UpdateWorkspace
413 | Op::DeleteRepo
414 | Op::PurgeRepo
415 | Op::TransferRepo
416 | Op::SetRepoVisibility
417 | Op::RemoveEmail
418 | Op::RemoveCollaborator
419 | Op::DisconnectIntegration
420 | Op::DeleteWebhook
421 | Op::DeleteActionsSecret
422 | Op::DeleteActionsVariable
423 | Op::SetActionsSecret
424 | Op::SetActionsVariable
425 | Op::SetModelRoutes
426 | Op::SetBasePermission
427 | Op::DeleteTeam
428 | Op::RemoveTeamRepo
429 | Op::MergePullRequest
430 | Op::RemoveRunner
431 | Op::DeleteRunnerGroup
432 | Op::UpdateRunnerSettings
433 )
434}
435
436/// Whether an operation only reads.
437pub fn reads_only(op: Op) -> bool {
438 NO_SCOPE.contains(&op.name())
439 || scope_for(op.name()).is_some_and(|scope| scope.level() == Level::Read)
440}
441
442/// What decides which actions a caller sees.
443pub enum Gate<'a> {
444 /// No limit beyond the person's own role.
445 Everything,
446 /// A g1t agent's token: the operations its run lists.
447 Agent(&'a AgentScope),
448 /// An access token with scopes.
449 Token(&'a TokenAccess),
450}
451
452impl Gate<'_> {
453 pub fn allows(&self, op: Op) -> bool {
454 match self {
455 Gate::Everything => true,
456 Gate::Agent(scope) => op.allowed_by(scope) && !NEVER.contains(&op.name()),
457 Gate::Token(access) => {
458 if NO_SCOPE.contains(&op.name()) {
459 return true;
460 }
461 match scope_for(op.name()) {
462 Some(scope) => access.allows(scope),
463 None => access.scopes.is_none(),
464 }
465 }
466 }
467 }
468}
469
470impl Tool {
471 pub fn by_name(name: &str) -> Option<&'static Tool> {
472 TOOLS.iter().find(|tool| tool.name == name)
473 }
474
475 pub fn action(&self, name: &str) -> Option<&'static Action> {
476 // The tools are 'static; find through TOOLS to keep the lifetime.
477 TOOLS
478 .iter()
479 .find(|tool| tool.name == self.name)
480 .and_then(|tool| tool.actions.iter().find(|action| action.name == name))
481 }
482
483 pub fn visible(&self, gate: &Gate) -> Vec<&'static Action> {
484 TOOLS
485 .iter()
486 .find(|tool| tool.name == self.name)
487 .map(|tool| tool.actions.iter().filter(|action| gate.allows(action.op)).collect())
488 .unwrap_or_default()
489 }
490
491 /// The flat input schema of the actions given.
492 pub fn input_schema(&self, actions: &[&Action]) -> Value {
493 let mut properties = Map::new();
494 let lines: Vec<String> = actions
495 .iter()
496 .map(|action| {
497 let required: Vec<String> = action.op.required();
498 if required.is_empty() {
499 format!("{}: {}.", action.name, action.summary)
500 } else {
501 format!("{} ({}): {}.", action.name, required.join(", "), action.summary)
502 }
503 })
504 .collect();
505 let mut action_schema = json!({
506 "type": "string",
507 "enum": actions.iter().map(|action| action.name).collect::<Vec<_>>(),
508 "description": lines.join("\n"),
509 });
510 if let Some(default) = self.default_action.filter(|name| actions.iter().any(|action| action.name == *name)) {
511 action_schema["default"] = json!(default);
512 }
513 properties.insert("action".to_owned(), action_schema);
514 for action in actions {
515 for (name, schema) in action.op.properties() {
516 merge_property(&mut properties, name, schema);
517 }
518 }
519 let mut required = vec![];
520 if self.default_action.is_none() {
521 required.push("action");
522 }
523 let mut schema = json!({ "type": "object", "properties": properties });
524 if !required.is_empty() {
525 schema["required"] = json!(required);
526 }
527 schema
528 }
529
530 /// The input schema keyed by action: one `oneOf` branch per action,
531 /// each with its own fields and the ones it needs.
532 pub fn discriminated(&self, actions: &[&Action]) -> Value {
533 let branches: Vec<Value> = actions
534 .iter()
535 .map(|action| {
536 let mut properties = Map::new();
537 properties.insert("action".to_owned(), json!({ "const": action.name }));
538 properties.extend(action.op.properties());
539 let mut required = vec![Value::String("action".to_owned())];
540 // The default action may leave `action` out.
541 if self.default_action == Some(action.name) {
542 required.clear();
543 }
544 required.extend(action.op.required().into_iter().map(Value::String));
545 json!({
546 "title": action.name,
547 "description": action.summary,
548 "type": "object",
549 "properties": properties,
550 "required": required,
551 })
552 })
553 .collect();
554 json!({ "type": "object", "oneOf": branches })
555 }
556
557 /// MCP's hints about the actions given: whether the tool only reads,
558 /// whether it can destroy something, and whether calling it twice is
559 /// the same as once.
560 pub fn annotations(&self, actions: &[&Action]) -> Value {
561 let read_only = actions.iter().all(|action| reads_only(action.op));
562 json!({
563 "title": self.title,
564 "readOnlyHint": read_only,
565 "destructiveHint": !read_only && actions.iter().any(|action| destructive(action.op)),
566 "idempotentHint": read_only,
567 "openWorldHint": false,
568 })
569 }
570
571 /// The tool as `tools/list` gives it, for a caller behind `gate`, or
572 /// `None` when it may use none of its actions.
573 pub fn listed(&self, gate: &Gate) -> Option<Value> {
574 let actions = self.visible(gate);
575 if actions.is_empty() {
576 return None;
577 }
578 Some(json!({
579 "name": self.name,
580 "title": self.title,
581 "description": self.description,
582 "inputSchema": self.input_schema(&actions),
583 "annotations": self.annotations(&actions),
584 }))
585 }
586}
587
588/// Adds a property to a tool's flat schema. The first action to use a name
589/// describes it; a later one with other allowed values adds them.
590fn merge_property(properties: &mut Map<String, Value>, name: String, schema: Value) {
591 match properties.get_mut(&name) {
592 None => {
593 properties.insert(name, schema);
594 }
595 Some(existing) => {
596 if let (Some(Value::Array(had)), Some(Value::Array(more))) =
597 (existing.get("enum").cloned(), schema.get("enum"))
598 {
599 let mut merged = had;
600 for value in more {
601 if !merged.contains(value) {
602 merged.push(value.clone());
603 }
604 }
605 existing["enum"] = Value::Array(merged);
606 }
607 // Different kinds of value under one name: say less, accept both.
608 if existing.get("type") != schema.get("type")
609 && let Some(fields) = existing.as_object_mut()
610 {
611 fields.remove("type");
612 fields.remove("items");
613 }
614 }
615 }
616}
617
618/// What a call to a tool runs: the operation its action names, or why not.
619pub fn resolve(tool: &Tool, arguments: &Value) -> Result<Op, String> {
620 let names = || {
621 tool.actions
622 .iter()
623 .map(|action| action.name)
624 .collect::<Vec<_>>()
625 .join(", ")
626 };
627 let Some(name) = arguments["action"].as_str().or(tool.default_action) else {
628 return Err(format!("Give an action: one of {}.", names()));
629 };
630 let Some(action) = tool.action(name) else {
631 return Err(format!("{} has no action {name}. Its actions: {}.", tool.name, names()));
632 };
633 let missing: Vec<String> = action
634 .op
635 .required()
636 .into_iter()
637 .filter(|field| arguments.get(field).is_none_or(Value::is_null))
638 .collect();
639 if !missing.is_empty() {
640 return Err(format!("{}.{name} needs {}.", tool.name, missing.join(", ")));
641 }
642 Ok(action.op)
643}
644
645#[cfg(test)]
646mod tests {
647 use super::*;
648 use g1t_contracts::scopes::{Preset, Scope};
649
650 fn listed(gate: &Gate) -> Vec<Value> {
651 TOOLS.iter().filter_map(|tool| tool.listed(gate)).collect()
652 }
653
654 fn token(scopes: Option<Vec<Scope>>) -> TokenAccess {
655 TokenAccess {
656 token_id: "tok_1".to_owned(),
657 scopes: scopes.map(|scopes| scopes.iter().map(|scope| scope.as_str().to_owned()).collect()),
658 legacy: false,
659 name: None,
660 }
661 }
662
663 #[test]
664 fn every_operation_is_exactly_one_action_of_one_tool() {
665 for op in Op::ALL {
666 let count = TOOLS
667 .iter()
668 .flat_map(|tool| tool.actions.iter())
669 .filter(|action| action.op == op)
670 .count();
671 assert_eq!(count, 1, "{} is {count} actions", op.name());
672 }
673 for tool in TOOLS {
674 let mut names = std::collections::HashSet::new();
675 for action in tool.actions {
676 assert!(names.insert(action.name), "{}.{} twice", tool.name, action.name);
677 }
678 if let Some(default) = tool.default_action {
679 assert!(tool.action(default).is_some(), "{}", tool.name);
680 }
681 }
682 assert!(TOOLS.len() <= 17, "{} tools", TOOLS.len());
683 }
684
685 #[test]
686 fn every_operation_needs_exactly_one_scope_or_none() {
687 use g1t_contracts::scopes::OPERATIONS;
688 for op in Op::ALL {
689 let mapped = OPERATIONS.iter().filter(|(name, _)| *name == op.name()).count();
690 let free = NO_SCOPE.contains(&op.name());
691 assert_eq!(mapped + usize::from(free), 1, "{}", op.name());
692 }
693 for (name, _) in OPERATIONS {
694 assert!(Op::by_name(name).is_some(), "{name} is not an operation");
695 }
696 }
697
698 #[test]
699 fn each_tool_schema_is_valid_with_one_branch_per_action() {
700 for tool in TOOLS {
701 let actions: Vec<&Action> = tool.actions.iter().collect();
702 let flat = tool.input_schema(&actions);
703 assert_eq!(flat["type"], "object");
704 assert!(flat.get("oneOf").is_none(), "no oneOf at the top level");
705 let listed: Vec<&str> = flat["properties"]["action"]["enum"]
706 .as_array()
707 .unwrap()
708 .iter()
709 .map(|name| name.as_str().unwrap())
710 .collect();
711 assert_eq!(listed, tool.actions.iter().map(|action| action.name).collect::<Vec<_>>());
712 for action in tool.actions {
713 for field in action.op.required() {
714 assert!(flat["properties"].get(&field).is_some(), "{}.{}: {field}", tool.name, action.name);
715 }
716 }
717 let keyed = tool.discriminated(&actions);
718 let branches = keyed["oneOf"].as_array().unwrap();
719 assert_eq!(branches.len(), tool.actions.len());
720 for (branch, action) in branches.iter().zip(tool.actions) {
721 assert_eq!(branch["properties"]["action"]["const"], action.name);
722 for field in branch["required"].as_array().unwrap() {
723 assert!(branch["properties"].get(field.as_str().unwrap()).is_some(), "{}.{}: {field}", tool.name, action.name);
724 }
725 }
726 // A well-formed JSON Schema object throughout.
727 let text = serde_json::to_string(&flat).unwrap();
728 assert!(serde_json::from_str::<Value>(&text).is_ok());
729 }
730 }
731
732 #[test]
733 fn a_read_only_token_sees_read_actions_only() {
734 let access = token(Preset::ReadOnly.scopes());
735 let gate = Gate::Token(&access);
736 for tool in TOOLS {
737 for action in tool.visible(&gate) {
738 assert!(reads_only(action.op), "{}.{}", tool.name, action.name);
739 }
740 }
741 let tools = listed(&gate);
742 for tool in &tools {
743 assert_eq!(tool["annotations"]["readOnlyHint"], true, "{}", tool["name"]);
744 assert_eq!(tool["annotations"]["destructiveHint"], false);
745 }
746 let issue = tools.iter().find(|tool| tool["name"] == "issue").unwrap();
747 assert_eq!(issue["inputSchema"]["properties"]["action"]["enum"], json!(["list", "get", "labels"]));
748 // Nothing of the agent tool is a read.
749 assert!(!tools.iter().any(|tool| tool["name"] == "agent"));
750 }
751
752 #[test]
753 fn a_narrow_token_sees_only_its_tools() {
754 let access = token(Some(vec![Scope::IssuesWrite]));
755 let names: Vec<Value> = listed(&Gate::Token(&access)).into_iter().map(|tool| tool["name"].clone()).collect();
756 // Labels and milestones are the repository's, managed with issues:write.
757 assert_eq!(names, vec![json!("repository"), json!("issue"), json!("plan"), json!("account")]);
758 // Notifications are a resource of their own: reading them lists
759 // only what reads.
760 let reader = token(Some(vec![Scope::NotificationsRead]));
761 let tools = listed(&Gate::Token(&reader));
762 let notifications = tools.iter().find(|tool| tool["name"] == "notifications").unwrap();
763 assert_eq!(
764 notifications["inputSchema"]["properties"]["action"]["enum"],
765 json!(["list", "get", "subscription", "watching", "watched"])
766 );
767 assert_eq!(notifications["annotations"]["readOnlyHint"], true);
768 let full = token(None);
769 assert_eq!(listed(&Gate::Token(&full)).len(), TOOLS.len());
770 assert_eq!(listed(&Gate::Everything).len(), TOOLS.len());
771 }
772
773 #[test]
774 fn a_tool_that_can_destroy_says_so() {
775 let tools = listed(&Gate::Everything);
776 let repository = tools.iter().find(|tool| tool["name"] == "repository").unwrap();
777 assert_eq!(repository["annotations"]["destructiveHint"], true);
778 assert_eq!(repository["annotations"]["readOnlyHint"], false);
779 let memory = tools.iter().find(|tool| tool["name"] == "memory").unwrap();
780 assert_eq!(memory["annotations"]["destructiveHint"], false);
781 }
782
783 #[test]
784 fn calls_resolve_to_their_operation_or_say_what_is_missing() {
785 let issue = Tool::by_name("issue").unwrap();
786 assert_eq!(resolve(issue, &json!({ "action": "get", "repo": "a/b", "number": 1 })), Ok(Op::GetIssue));
787 assert_eq!(resolve(issue, &json!({ "action": "get", "repo": "a/b" })), Err("issue.get needs number.".to_owned()));
788 assert!(resolve(issue, &json!({})).unwrap_err().starts_with("Give an action"));
789 assert!(resolve(issue, &json!({ "action": "explode" })).unwrap_err().contains("no action explode"));
790 let search = Tool::by_name("search").unwrap();
791 assert_eq!(resolve(search, &json!({ "query": "x" })), Ok(Op::Search));
792 let account = Tool::by_name("account").unwrap();
793 assert_eq!(resolve(account, &json!({})), Ok(Op::Whoami));
794 }
795
796 #[test]
797 fn teams_are_one_tool_and_a_workspace_reader_sees_only_its_reads() {
798 let team = Tool::by_name("team").unwrap();
799 let names: Vec<&str> = team.actions.iter().map(|action| action.name).collect();
800 assert_eq!(
801 names,
802 [
803 "list",
804 "get",
805 "create",
806 "update",
807 "delete",
808 "list_members",
809 "set_member",
810 "remove_member",
811 "list_child_teams",
812 "list_repos",
813 "set_repo",
814 "remove_repo",
815 "set_review_assignment",
816 "list_user_teams",
817 ]
818 );
819 let reader = token(Some(vec![Scope::WorkspaceRead]));
820 let tools = listed(&Gate::Token(&reader));
821 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
822 assert_eq!(
823 listed_team["inputSchema"]["properties"]["action"]["enum"],
824 json!(["list", "get", "list_members", "list_child_teams", "list_repos", "list_user_teams"])
825 );
826 assert_eq!(listed_team["annotations"]["readOnlyHint"], true);
827 // A team's role on a repository is who has access.
828 let admin = token(Some(vec![Scope::WorkspaceAdmin]));
829 let tools = listed(&Gate::Token(&admin));
830 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
831 let actions = listed_team["inputSchema"]["properties"]["action"]["enum"].as_array().unwrap();
832 assert!(actions.contains(&json!("set_review_assignment")) && !actions.contains(&json!("set_repo")));
833 let access = token(Some(vec![Scope::AccessAdmin]));
834 let tools = listed(&Gate::Token(&access));
835 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
836 assert_eq!(listed_team["inputSchema"]["properties"]["action"]["enum"], json!(["set_repo", "remove_repo"]));
837 // Both kinds of role a schema names are offered.
838 let roles = &listed(&Gate::Everything).into_iter().find(|tool| tool["name"] == "team").unwrap()["inputSchema"]
839 ["properties"]["role"]["enum"];
840 for role in ["member", "maintainer", "read", "admin"] {
841 assert!(roles.as_array().unwrap().contains(&json!(role)), "{role}");
842 }
843 assert_eq!(
844 resolve(team, &json!({ "action": "set_repo", "workspace": "acme", "team": "backend", "repo": "rocket" })),
845 Err("team.set_repo needs role.".to_owned())
846 );
847 }
848
849 #[test]
850 fn reviewers_and_code_owners_are_actions_of_their_tools() {
851 let pull = Tool::by_name("pull_request").unwrap();
852 assert_eq!(
853 resolve(pull, &json!({ "action": "request_reviewers", "repo": "a/b", "number": 1, "team_reviewers": ["backend"] })),
854 Ok(Op::RequestReviewers)
855 );
856 assert_eq!(pull.action("remove_requested_reviewers").map(|action| action.op), Some(Op::RemoveRequestedReviewers));
857 let repository = Tool::by_name("repository").unwrap();
858 assert_eq!(resolve(repository, &json!({ "action": "codeowners", "repo": "a/b" })), Ok(Op::GetCodeownersErrors));
859 assert!(reads_only(Op::GetCodeownersErrors));
860 assert!(!reads_only(Op::RequestReviewers));
861 }
862
863 /// How much smaller `tools/list` is than one tool per operation. Run
864 /// with `--nocapture` to see the numbers.
865 #[test]
866 fn the_tool_list_is_much_smaller_than_one_tool_per_operation() {
867 let before: Vec<Value> = Op::ALL
868 .into_iter()
869 .map(|op| json!({ "name": op.name(), "description": op.description(), "inputSchema": op.input() }))
870 .collect();
871 let after = listed(&Gate::Everything);
872 let before_bytes = serde_json::to_string(&json!({ "tools": before })).unwrap().len();
873 let after_bytes = serde_json::to_string(&json!({ "tools": after })).unwrap().len();
874 let agent = token(Preset::Agent.scopes());
875 let agent_bytes = serde_json::to_string(&json!({ "tools": listed(&Gate::Token(&agent)) })).unwrap().len();
876 let read = token(Preset::ReadOnly.scopes());
877 let read_bytes = serde_json::to_string(&json!({ "tools": listed(&Gate::Token(&read)) })).unwrap().len();
878 println!(
879 "tools/list: before {} tools, {before_bytes} bytes (~{} tokens); after {} tools, {after_bytes} bytes (~{} tokens); agent preset {agent_bytes} bytes (~{} tokens); read only {read_bytes} bytes (~{} tokens)",
880 before.len(),
881 before_bytes / 4,
882 after.len(),
883 after_bytes / 4,
884 agent_bytes / 4,
885 read_bytes / 4,
886 );
887 assert!(after_bytes * 2 < before_bytes, "{after_bytes} vs {before_bytes}");
888 }
889}