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