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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, and its invoices. 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 ],
320 },
321 Tool {
322 name: "security",
323 title: "Security",
324 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.",
325 default_action: Some("secret_alerts"),
326 actions: &[
327 a("secret_alerts", Op::Security(SecurityOp::ListSecretAlerts), "Secret scanning alerts; by state, secret_type, validity, bypassed"),
328 a("secret_alert", Op::Security(SecurityOp::GetSecretAlert), "One secret alert, with where it was found and its bypass requests"),
329 a("update_secret_alert", Op::Security(SecurityOp::UpdateSecretAlert), "Dismiss a secret alert with a reason, or reopen it"),
330 a("secret_locations", Op::Security(SecurityOp::ListSecretLocations), "Every file, line and commit a secret is in"),
331 a("bypass", Op::Security(SecurityOp::BypassPushProtection), "Push past push protection with a reason, or ask to"),
332 a("check_validity", Op::Security(SecurityOp::CheckSecretValidity), "Ask a secret's issuer whether it still works"),
333 a("bypass_requests", Op::Security(SecurityOp::ListBypassRequests), "A workspace's push protection bypass requests"),
334 a("review_bypass", Op::Security(SecurityOp::ReviewBypassRequest), "Approve, deny or cancel a bypass request"),
335 a("patterns", Op::Security(SecurityOp::ListCustomPatterns), "Custom secret patterns of a repository or workspace"),
336 a("create_pattern", Op::Security(SecurityOp::CreateCustomPattern), "Create a custom secret pattern, as a draft or published"),
337 a("update_pattern", Op::Security(SecurityOp::UpdateCustomPattern), "Change, publish or unpublish a custom pattern"),
338 a("delete_pattern", Op::Security(SecurityOp::DeleteCustomPattern), "Delete a custom pattern"),
339 a("dry_run_pattern", Op::Security(SecurityOp::DryRunCustomPattern), "Run a pattern over the default branch without saving it"),
340 a("code_alerts", Op::Security(SecurityOp::ListCodeAlerts), "Code scanning alerts; by state, severity, tool, rule_id"),
341 a("code_alert", Op::Security(SecurityOp::GetCodeAlert), "One code scanning alert by number"),
342 a("update_code_alert", Op::Security(SecurityOp::UpdateCodeAlert), "Dismiss a code scanning alert with a reason, or reopen it"),
343 a("analyses", Op::Security(SecurityOp::ListAnalyses), "Code scanning analyses, newest first"),
344 a("upload_sarif", Op::Security(SecurityOp::UploadSarif), "Upload a SARIF file, gzipped and base64-encoded"),
345 a("sarif_upload", Op::Security(SecurityOp::GetSarifUpload), "Whether a SARIF upload was read, and its analyses"),
346 a("vulnerability_alerts", Op::Security(SecurityOp::ListVulnerabilityAlerts), "Vulnerable dependencies; by state, severity, ecosystem, package"),
347 a("vulnerability_alert", Op::Security(SecurityOp::GetVulnerabilityAlert), "One vulnerability alert"),
348 a("update_vulnerability_alert", Op::Security(SecurityOp::UpdateVulnerabilityAlert), "Dismiss a vulnerability alert with a reason, or reopen it"),
349 a("fix", Op::Security(SecurityOp::FixAlert), "Put g1t on an issue to fix an alert"),
350 a("dependency_graph", Op::Security(SecurityOp::GetDependencyGraph), "Every package the lockfiles resolve, direct or transitive"),
351 a("sbom", Op::Security(SecurityOp::GetSbom), "The dependency graph as an SPDX 2.3 document"),
352 a("compare_dependencies", Op::Security(SecurityOp::CompareDependencies), "What changes in dependencies between base...head"),
353 a("settings", Op::Security(SecurityOp::GetSettings), "A repository's security settings"),
354 a("update_settings", Op::Security(SecurityOp::UpdateSettings), "Change when checks fail and dependency review's policy"),
355 a("workspace_settings", Op::Security(SecurityOp::GetWorkspaceSettings), "A workspace's delegated bypass and validity checks"),
356 a("update_workspace_settings", Op::Security(SecurityOp::UpdateWorkspaceSettings), "Turn delegated bypass or validity checks on or off"),
357 a("overview", Op::Security(SecurityOp::GetOverview), "A workspace's alerts, trends and coverage"),
358 ],
359 },
360 Tool {
361 name: "notifications",
362 title: "Notifications",
363 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.",
364 default_action: Some("list"),
365 actions: &[
366 a("list", Op::ListNotifications, "Unread threads, latest first; all, a view, a reason, a repository"),
367 a("get", Op::GetNotificationThread, "One thread with its recent activity and your subscription"),
368 a("mark_read", Op::MarkThreadRead, "Mark a thread read, or unread"),
369 a("mark_all_read", Op::MarkNotificationsRead, "Mark everything read up to a time, or one repository's"),
370 a("done", Op::MarkThreadDone, "Mark a thread done; new activity brings it back"),
371 a("save", Op::SaveThread, "Save a thread, or unsave it"),
372 a("snooze", Op::SnoozeThread, "Snooze a thread until a time, or bring it back"),
373 a("subscription", Op::GetThreadSubscription, "Your subscription to an issue or pull request"),
374 a("subscribe", Op::SetThreadSubscription, "Subscribe to an issue or pull request, or ignore it"),
375 a("unsubscribe", Op::DeleteThreadSubscription, "Unsubscribe until you comment or are mentioned"),
376 a("watching", Op::GetRepoSubscription, "How you watch a repository"),
377 a("watch", Op::SetRepoSubscription, "Watch a repository: participating, all, ignore or custom"),
378 a("unwatch", Op::DeleteRepoSubscription, "Stop watching a repository"),
379 a("watched", Op::ListWatchedRepos, "Repositories you watch other than the default way"),
380 ],
381 },
382 Tool {
383 name: "account",
384 title: "Your account",
385 description: "Who this token acts as and its workspaces (`whoami`), your email addresses, your invites, and invitations to repositories waiting for you.",
386 default_action: Some("whoami"),
387 actions: &[
388 a("whoami", Op::Whoami, "Who the token acts as, and its workspaces"),
389 a("list_emails", Op::ListEmails, "Your addresses"),
390 a("add_email", Op::AddEmail, "Add an address"),
391 a("remove_email", Op::RemoveEmail, "Remove an address"),
392 a("update_email_settings", Op::UpdateEmailSettings, "Primary, backup and privacy"),
393 a("list_invites", Op::ListInvites, "Your invites to g1t"),
394 a("create_invite", Op::CreateInvite, "Make an invite"),
395 a("revoke_invite", Op::RevokeInvite, "Revoke one"),
396 a("list_repository_invitations", Op::ListMyRepoInvitations, "Invitations to repositories for you"),
397 a("accept_repository_invitation", Op::AcceptRepoInvitation, "Accept one"),
398 a("decline_repository_invitation", Op::DeclineRepoInvitation, "Decline one"),
399 ],
400 },
401];
402
403/// Operations that cannot be undone, or reach beyond g1t's own records:
404/// clients ask before running a tool that has any of them.
405fn destructive(op: Op) -> bool {
406 matches!(
407 op,
408 Op::Security(SecurityOp::DeleteCustomPattern | SecurityOp::BypassPushProtection)
409 | Op::Rules(RulesOp::DeleteRepoRuleset | RulesOp::DeleteWorkspaceRuleset)
410 | Op::DeleteWorkspace
411 | Op::UpdateWorkspace
412 | Op::DeleteRepo
413 | Op::PurgeRepo
414 | Op::TransferRepo
415 | Op::SetRepoVisibility
416 | Op::RemoveEmail
417 | Op::RemoveCollaborator
418 | Op::DisconnectIntegration
419 | Op::DeleteWebhook
420 | Op::DeleteActionsSecret
421 | Op::DeleteActionsVariable
422 | Op::SetActionsSecret
423 | Op::SetActionsVariable
424 | Op::SetModelRoutes
425 | Op::SetBasePermission
426 | Op::DeleteTeam
427 | Op::RemoveTeamRepo
428 | Op::MergePullRequest
429 | Op::RemoveRunner
430 | Op::DeleteRunnerGroup
431 | Op::UpdateRunnerSettings
432 )
433}
434
435/// Whether an operation only reads.
436pub fn reads_only(op: Op) -> bool {
437 NO_SCOPE.contains(&op.name())
438 || scope_for(op.name()).is_some_and(|scope| scope.level() == Level::Read)
439}
440
441/// What decides which actions a caller sees.
442pub enum Gate<'a> {
443 /// No limit beyond the person's own role.
444 Everything,
445 /// A g1t agent's token: the operations its run lists.
446 Agent(&'a AgentScope),
447 /// An access token with scopes.
448 Token(&'a TokenAccess),
449}
450
451impl Gate<'_> {
452 pub fn allows(&self, op: Op) -> bool {
453 match self {
454 Gate::Everything => true,
455 Gate::Agent(scope) => op.allowed_by(scope) && !NEVER.contains(&op.name()),
456 Gate::Token(access) => {
457 if NO_SCOPE.contains(&op.name()) {
458 return true;
459 }
460 match scope_for(op.name()) {
461 Some(scope) => access.allows(scope),
462 None => access.scopes.is_none(),
463 }
464 }
465 }
466 }
467}
468
469impl Tool {
470 pub fn by_name(name: &str) -> Option<&'static Tool> {
471 TOOLS.iter().find(|tool| tool.name == name)
472 }
473
474 pub fn action(&self, name: &str) -> Option<&'static Action> {
475 // The tools are 'static; find through TOOLS to keep the lifetime.
476 TOOLS
477 .iter()
478 .find(|tool| tool.name == self.name)
479 .and_then(|tool| tool.actions.iter().find(|action| action.name == name))
480 }
481
482 pub fn visible(&self, gate: &Gate) -> Vec<&'static Action> {
483 TOOLS
484 .iter()
485 .find(|tool| tool.name == self.name)
486 .map(|tool| tool.actions.iter().filter(|action| gate.allows(action.op)).collect())
487 .unwrap_or_default()
488 }
489
490 /// The flat input schema of the actions given.
491 pub fn input_schema(&self, actions: &[&Action]) -> Value {
492 let mut properties = Map::new();
493 let lines: Vec<String> = actions
494 .iter()
495 .map(|action| {
496 let required: Vec<String> = action.op.required();
497 if required.is_empty() {
498 format!("{}: {}.", action.name, action.summary)
499 } else {
500 format!("{} ({}): {}.", action.name, required.join(", "), action.summary)
501 }
502 })
503 .collect();
504 let mut action_schema = json!({
505 "type": "string",
506 "enum": actions.iter().map(|action| action.name).collect::<Vec<_>>(),
507 "description": lines.join("\n"),
508 });
509 if let Some(default) = self.default_action.filter(|name| actions.iter().any(|action| action.name == *name)) {
510 action_schema["default"] = json!(default);
511 }
512 properties.insert("action".to_owned(), action_schema);
513 for action in actions {
514 for (name, schema) in action.op.properties() {
515 merge_property(&mut properties, name, schema);
516 }
517 }
518 let mut required = vec![];
519 if self.default_action.is_none() {
520 required.push("action");
521 }
522 let mut schema = json!({ "type": "object", "properties": properties });
523 if !required.is_empty() {
524 schema["required"] = json!(required);
525 }
526 schema
527 }
528
529 /// The input schema keyed by action: one `oneOf` branch per action,
530 /// each with its own fields and the ones it needs.
531 pub fn discriminated(&self, actions: &[&Action]) -> Value {
532 let branches: Vec<Value> = actions
533 .iter()
534 .map(|action| {
535 let mut properties = Map::new();
536 properties.insert("action".to_owned(), json!({ "const": action.name }));
537 properties.extend(action.op.properties());
538 let mut required = vec![Value::String("action".to_owned())];
539 // The default action may leave `action` out.
540 if self.default_action == Some(action.name) {
541 required.clear();
542 }
543 required.extend(action.op.required().into_iter().map(Value::String));
544 json!({
545 "title": action.name,
546 "description": action.summary,
547 "type": "object",
548 "properties": properties,
549 "required": required,
550 })
551 })
552 .collect();
553 json!({ "type": "object", "oneOf": branches })
554 }
555
556 /// MCP's hints about the actions given: whether the tool only reads,
557 /// whether it can destroy something, and whether calling it twice is
558 /// the same as once.
559 pub fn annotations(&self, actions: &[&Action]) -> Value {
560 let read_only = actions.iter().all(|action| reads_only(action.op));
561 json!({
562 "title": self.title,
563 "readOnlyHint": read_only,
564 "destructiveHint": !read_only && actions.iter().any(|action| destructive(action.op)),
565 "idempotentHint": read_only,
566 "openWorldHint": false,
567 })
568 }
569
570 /// The tool as `tools/list` gives it, for a caller behind `gate`, or
571 /// `None` when it may use none of its actions.
572 pub fn listed(&self, gate: &Gate) -> Option<Value> {
573 let actions = self.visible(gate);
574 if actions.is_empty() {
575 return None;
576 }
577 Some(json!({
578 "name": self.name,
579 "title": self.title,
580 "description": self.description,
581 "inputSchema": self.input_schema(&actions),
582 "annotations": self.annotations(&actions),
583 }))
584 }
585}
586
587/// Adds a property to a tool's flat schema. The first action to use a name
588/// describes it; a later one with other allowed values adds them.
589fn merge_property(properties: &mut Map<String, Value>, name: String, schema: Value) {
590 match properties.get_mut(&name) {
591 None => {
592 properties.insert(name, schema);
593 }
594 Some(existing) => {
595 if let (Some(Value::Array(had)), Some(Value::Array(more))) =
596 (existing.get("enum").cloned(), schema.get("enum"))
597 {
598 let mut merged = had;
599 for value in more {
600 if !merged.contains(value) {
601 merged.push(value.clone());
602 }
603 }
604 existing["enum"] = Value::Array(merged);
605 }
606 // Different kinds of value under one name: say less, accept both.
607 if existing.get("type") != schema.get("type")
608 && let Some(fields) = existing.as_object_mut()
609 {
610 fields.remove("type");
611 fields.remove("items");
612 }
613 }
614 }
615}
616
617/// What a call to a tool runs: the operation its action names, or why not.
618pub fn resolve(tool: &Tool, arguments: &Value) -> Result<Op, String> {
619 let names = || {
620 tool.actions
621 .iter()
622 .map(|action| action.name)
623 .collect::<Vec<_>>()
624 .join(", ")
625 };
626 let Some(name) = arguments["action"].as_str().or(tool.default_action) else {
627 return Err(format!("Give an action: one of {}.", names()));
628 };
629 let Some(action) = tool.action(name) else {
630 return Err(format!("{} has no action {name}. Its actions: {}.", tool.name, names()));
631 };
632 let missing: Vec<String> = action
633 .op
634 .required()
635 .into_iter()
636 .filter(|field| arguments.get(field).is_none_or(Value::is_null))
637 .collect();
638 if !missing.is_empty() {
639 return Err(format!("{}.{name} needs {}.", tool.name, missing.join(", ")));
640 }
641 Ok(action.op)
642}
643
644#[cfg(test)]
645mod tests {
646 use super::*;
647 use g1t_contracts::scopes::{Preset, Scope};
648
649 fn listed(gate: &Gate) -> Vec<Value> {
650 TOOLS.iter().filter_map(|tool| tool.listed(gate)).collect()
651 }
652
653 fn token(scopes: Option<Vec<Scope>>) -> TokenAccess {
654 TokenAccess {
655 token_id: "tok_1".to_owned(),
656 scopes: scopes.map(|scopes| scopes.iter().map(|scope| scope.as_str().to_owned()).collect()),
657 legacy: false,
658 }
659 }
660
661 #[test]
662 fn every_operation_is_exactly_one_action_of_one_tool() {
663 for op in Op::ALL {
664 let count = TOOLS
665 .iter()
666 .flat_map(|tool| tool.actions.iter())
667 .filter(|action| action.op == op)
668 .count();
669 assert_eq!(count, 1, "{} is {count} actions", op.name());
670 }
671 for tool in TOOLS {
672 let mut names = std::collections::HashSet::new();
673 for action in tool.actions {
674 assert!(names.insert(action.name), "{}.{} twice", tool.name, action.name);
675 }
676 if let Some(default) = tool.default_action {
677 assert!(tool.action(default).is_some(), "{}", tool.name);
678 }
679 }
680 assert!(TOOLS.len() <= 17, "{} tools", TOOLS.len());
681 }
682
683 #[test]
684 fn every_operation_needs_exactly_one_scope_or_none() {
685 use g1t_contracts::scopes::OPERATIONS;
686 for op in Op::ALL {
687 let mapped = OPERATIONS.iter().filter(|(name, _)| *name == op.name()).count();
688 let free = NO_SCOPE.contains(&op.name());
689 assert_eq!(mapped + usize::from(free), 1, "{}", op.name());
690 }
691 for (name, _) in OPERATIONS {
692 assert!(Op::by_name(name).is_some(), "{name} is not an operation");
693 }
694 }
695
696 #[test]
697 fn each_tool_schema_is_valid_with_one_branch_per_action() {
698 for tool in TOOLS {
699 let actions: Vec<&Action> = tool.actions.iter().collect();
700 let flat = tool.input_schema(&actions);
701 assert_eq!(flat["type"], "object");
702 assert!(flat.get("oneOf").is_none(), "no oneOf at the top level");
703 let listed: Vec<&str> = flat["properties"]["action"]["enum"]
704 .as_array()
705 .unwrap()
706 .iter()
707 .map(|name| name.as_str().unwrap())
708 .collect();
709 assert_eq!(listed, tool.actions.iter().map(|action| action.name).collect::<Vec<_>>());
710 for action in tool.actions {
711 for field in action.op.required() {
712 assert!(flat["properties"].get(&field).is_some(), "{}.{}: {field}", tool.name, action.name);
713 }
714 }
715 let keyed = tool.discriminated(&actions);
716 let branches = keyed["oneOf"].as_array().unwrap();
717 assert_eq!(branches.len(), tool.actions.len());
718 for (branch, action) in branches.iter().zip(tool.actions) {
719 assert_eq!(branch["properties"]["action"]["const"], action.name);
720 for field in branch["required"].as_array().unwrap() {
721 assert!(branch["properties"].get(field.as_str().unwrap()).is_some(), "{}.{}: {field}", tool.name, action.name);
722 }
723 }
724 // A well-formed JSON Schema object throughout.
725 let text = serde_json::to_string(&flat).unwrap();
726 assert!(serde_json::from_str::<Value>(&text).is_ok());
727 }
728 }
729
730 #[test]
731 fn a_read_only_token_sees_read_actions_only() {
732 let access = token(Preset::ReadOnly.scopes());
733 let gate = Gate::Token(&access);
734 for tool in TOOLS {
735 for action in tool.visible(&gate) {
736 assert!(reads_only(action.op), "{}.{}", tool.name, action.name);
737 }
738 }
739 let tools = listed(&gate);
740 for tool in &tools {
741 assert_eq!(tool["annotations"]["readOnlyHint"], true, "{}", tool["name"]);
742 assert_eq!(tool["annotations"]["destructiveHint"], false);
743 }
744 let issue = tools.iter().find(|tool| tool["name"] == "issue").unwrap();
745 assert_eq!(issue["inputSchema"]["properties"]["action"]["enum"], json!(["list", "get", "labels"]));
746 // Nothing of the agent tool is a read.
747 assert!(!tools.iter().any(|tool| tool["name"] == "agent"));
748 }
749
750 #[test]
751 fn a_narrow_token_sees_only_its_tools() {
752 let access = token(Some(vec![Scope::IssuesWrite]));
753 let names: Vec<Value> = listed(&Gate::Token(&access)).into_iter().map(|tool| tool["name"].clone()).collect();
754 // Labels and milestones are the repository's, managed with issues:write.
755 assert_eq!(names, vec![json!("repository"), json!("issue"), json!("plan"), json!("account")]);
756 // Notifications are a resource of their own: reading them lists
757 // only what reads.
758 let reader = token(Some(vec![Scope::NotificationsRead]));
759 let tools = listed(&Gate::Token(&reader));
760 let notifications = tools.iter().find(|tool| tool["name"] == "notifications").unwrap();
761 assert_eq!(
762 notifications["inputSchema"]["properties"]["action"]["enum"],
763 json!(["list", "get", "subscription", "watching", "watched"])
764 );
765 assert_eq!(notifications["annotations"]["readOnlyHint"], true);
766 let full = token(None);
767 assert_eq!(listed(&Gate::Token(&full)).len(), TOOLS.len());
768 assert_eq!(listed(&Gate::Everything).len(), TOOLS.len());
769 }
770
771 #[test]
772 fn a_tool_that_can_destroy_says_so() {
773 let tools = listed(&Gate::Everything);
774 let repository = tools.iter().find(|tool| tool["name"] == "repository").unwrap();
775 assert_eq!(repository["annotations"]["destructiveHint"], true);
776 assert_eq!(repository["annotations"]["readOnlyHint"], false);
777 let memory = tools.iter().find(|tool| tool["name"] == "memory").unwrap();
778 assert_eq!(memory["annotations"]["destructiveHint"], false);
779 }
780
781 #[test]
782 fn calls_resolve_to_their_operation_or_say_what_is_missing() {
783 let issue = Tool::by_name("issue").unwrap();
784 assert_eq!(resolve(issue, &json!({ "action": "get", "repo": "a/b", "number": 1 })), Ok(Op::GetIssue));
785 assert_eq!(resolve(issue, &json!({ "action": "get", "repo": "a/b" })), Err("issue.get needs number.".to_owned()));
786 assert!(resolve(issue, &json!({})).unwrap_err().starts_with("Give an action"));
787 assert!(resolve(issue, &json!({ "action": "explode" })).unwrap_err().contains("no action explode"));
788 let search = Tool::by_name("search").unwrap();
789 assert_eq!(resolve(search, &json!({ "query": "x" })), Ok(Op::Search));
790 let account = Tool::by_name("account").unwrap();
791 assert_eq!(resolve(account, &json!({})), Ok(Op::Whoami));
792 }
793
794 #[test]
795 fn teams_are_one_tool_and_a_workspace_reader_sees_only_its_reads() {
796 let team = Tool::by_name("team").unwrap();
797 let names: Vec<&str> = team.actions.iter().map(|action| action.name).collect();
798 assert_eq!(
799 names,
800 [
801 "list",
802 "get",
803 "create",
804 "update",
805 "delete",
806 "list_members",
807 "set_member",
808 "remove_member",
809 "list_child_teams",
810 "list_repos",
811 "set_repo",
812 "remove_repo",
813 "set_review_assignment",
814 "list_user_teams",
815 ]
816 );
817 let reader = token(Some(vec![Scope::WorkspaceRead]));
818 let tools = listed(&Gate::Token(&reader));
819 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
820 assert_eq!(
821 listed_team["inputSchema"]["properties"]["action"]["enum"],
822 json!(["list", "get", "list_members", "list_child_teams", "list_repos", "list_user_teams"])
823 );
824 assert_eq!(listed_team["annotations"]["readOnlyHint"], true);
825 // A team's role on a repository is who has access.
826 let admin = token(Some(vec![Scope::WorkspaceAdmin]));
827 let tools = listed(&Gate::Token(&admin));
828 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
829 let actions = listed_team["inputSchema"]["properties"]["action"]["enum"].as_array().unwrap();
830 assert!(actions.contains(&json!("set_review_assignment")) && !actions.contains(&json!("set_repo")));
831 let access = token(Some(vec![Scope::AccessAdmin]));
832 let tools = listed(&Gate::Token(&access));
833 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
834 assert_eq!(listed_team["inputSchema"]["properties"]["action"]["enum"], json!(["set_repo", "remove_repo"]));
835 // Both kinds of role a schema names are offered.
836 let roles = &listed(&Gate::Everything).into_iter().find(|tool| tool["name"] == "team").unwrap()["inputSchema"]
837 ["properties"]["role"]["enum"];
838 for role in ["member", "maintainer", "read", "admin"] {
839 assert!(roles.as_array().unwrap().contains(&json!(role)), "{role}");
840 }
841 assert_eq!(
842 resolve(team, &json!({ "action": "set_repo", "workspace": "acme", "team": "backend", "repo": "rocket" })),
843 Err("team.set_repo needs role.".to_owned())
844 );
845 }
846
847 #[test]
848 fn reviewers_and_code_owners_are_actions_of_their_tools() {
849 let pull = Tool::by_name("pull_request").unwrap();
850 assert_eq!(
851 resolve(pull, &json!({ "action": "request_reviewers", "repo": "a/b", "number": 1, "team_reviewers": ["backend"] })),
852 Ok(Op::RequestReviewers)
853 );
854 assert_eq!(pull.action("remove_requested_reviewers").map(|action| action.op), Some(Op::RemoveRequestedReviewers));
855 let repository = Tool::by_name("repository").unwrap();
856 assert_eq!(resolve(repository, &json!({ "action": "codeowners", "repo": "a/b" })), Ok(Op::GetCodeownersErrors));
857 assert!(reads_only(Op::GetCodeownersErrors));
858 assert!(!reads_only(Op::RequestReviewers));
859 }
860
861 /// How much smaller `tools/list` is than one tool per operation. Run
862 /// with `--nocapture` to see the numbers.
863 #[test]
864 fn the_tool_list_is_much_smaller_than_one_tool_per_operation() {
865 let before: Vec<Value> = Op::ALL
866 .into_iter()
867 .map(|op| json!({ "name": op.name(), "description": op.description(), "inputSchema": op.input() }))
868 .collect();
869 let after = listed(&Gate::Everything);
870 let before_bytes = serde_json::to_string(&json!({ "tools": before })).unwrap().len();
871 let after_bytes = serde_json::to_string(&json!({ "tools": after })).unwrap().len();
872 let agent = token(Preset::Agent.scopes());
873 let agent_bytes = serde_json::to_string(&json!({ "tools": listed(&Gate::Token(&agent)) })).unwrap().len();
874 let read = token(Preset::ReadOnly.scopes());
875 let read_bytes = serde_json::to_string(&json!({ "tools": listed(&Gate::Token(&read)) })).unwrap().len();
876 println!(
877 "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)",
878 before.len(),
879 before_bytes / 4,
880 after.len(),
881 after_bytes / 4,
882 agent_bytes / 4,
883 read_bytes / 4,
884 );
885 assert!(after_bytes * 2 < before_bytes, "{after_bytes} vs {before_bytes}");
886 }
887}