Skip to content
856 linesCodeBlameRaw
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("create", Op::CreateWorkspace, "Create a workspace"),
274 a("delete", Op::DeleteWorkspace, "Delete a workspace and everything in it (support can restore it for 30 days)"),
275 a("update", Op::UpdateWorkspace, "Change its name, description or base permission"),
276 a("list_invites", Op::ListWorkspaceInvites, "Its invites"),
277 a("invite_member", Op::InviteMember, "Invite an email address"),
278 a("revoke_invite", Op::RevokeWorkspaceInvite, "Revoke a pending invite"),
279 a("list_integrations", Op::ListIntegrations, "Model providers, alert sources, trackers"),
280 a("connect_integration", Op::ConnectIntegration, "Connect one"),
281 a("disconnect_integration", Op::DisconnectIntegration, "Remove one"),
282 a("test_integration", Op::TestIntegration, "Check its credentials"),
283 a("get_model_routes", Op::GetModelRoutes, "Where each kind of work's model requests go"),
284 a("set_model_routes", Op::SetModelRoutes, "Replace them"),
285 a("list_pinned_projects", Op::ListPinnedProjects, "Your pinned projects in it, in your order"),
286 a("pin_project", Op::PinProject, "Pin a project, at a position or the end"),
287 a("unpin_project", Op::UnpinProject, "Unpin a project"),
288 a("reorder_pinned_projects", Op::ReorderPinnedProjects, "Put your pins in a new order"),
289 ],
290 },
291 Tool {
292 name: "security",
293 title: "Security",
294 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.",
295 default_action: Some("secret_alerts"),
296 actions: &[
297 a("secret_alerts", Op::Security(SecurityOp::ListSecretAlerts), "Secret scanning alerts; by state, secret_type, validity, bypassed"),
298 a("secret_alert", Op::Security(SecurityOp::GetSecretAlert), "One secret alert, with where it was found and its bypass requests"),
299 a("update_secret_alert", Op::Security(SecurityOp::UpdateSecretAlert), "Dismiss a secret alert with a reason, or reopen it"),
300 a("secret_locations", Op::Security(SecurityOp::ListSecretLocations), "Every file, line and commit a secret is in"),
301 a("bypass", Op::Security(SecurityOp::BypassPushProtection), "Push past push protection with a reason, or ask to"),
302 a("check_validity", Op::Security(SecurityOp::CheckSecretValidity), "Ask a secret's issuer whether it still works"),
303 a("bypass_requests", Op::Security(SecurityOp::ListBypassRequests), "A workspace's push protection bypass requests"),
304 a("review_bypass", Op::Security(SecurityOp::ReviewBypassRequest), "Approve, deny or cancel a bypass request"),
305 a("patterns", Op::Security(SecurityOp::ListCustomPatterns), "Custom secret patterns of a repository or workspace"),
306 a("create_pattern", Op::Security(SecurityOp::CreateCustomPattern), "Create a custom secret pattern, as a draft or published"),
307 a("update_pattern", Op::Security(SecurityOp::UpdateCustomPattern), "Change, publish or unpublish a custom pattern"),
308 a("delete_pattern", Op::Security(SecurityOp::DeleteCustomPattern), "Delete a custom pattern"),
309 a("dry_run_pattern", Op::Security(SecurityOp::DryRunCustomPattern), "Run a pattern over the default branch without saving it"),
310 a("code_alerts", Op::Security(SecurityOp::ListCodeAlerts), "Code scanning alerts; by state, severity, tool, rule_id"),
311 a("code_alert", Op::Security(SecurityOp::GetCodeAlert), "One code scanning alert by number"),
312 a("update_code_alert", Op::Security(SecurityOp::UpdateCodeAlert), "Dismiss a code scanning alert with a reason, or reopen it"),
313 a("analyses", Op::Security(SecurityOp::ListAnalyses), "Code scanning analyses, newest first"),
314 a("upload_sarif", Op::Security(SecurityOp::UploadSarif), "Upload a SARIF file, gzipped and base64-encoded"),
315 a("sarif_upload", Op::Security(SecurityOp::GetSarifUpload), "Whether a SARIF upload was read, and its analyses"),
316 a("vulnerability_alerts", Op::Security(SecurityOp::ListVulnerabilityAlerts), "Vulnerable dependencies; by state, severity, ecosystem, package"),
317 a("vulnerability_alert", Op::Security(SecurityOp::GetVulnerabilityAlert), "One vulnerability alert"),
318 a("update_vulnerability_alert", Op::Security(SecurityOp::UpdateVulnerabilityAlert), "Dismiss a vulnerability alert with a reason, or reopen it"),
319 a("fix", Op::Security(SecurityOp::FixAlert), "Put g1t on an issue to fix an alert"),
320 a("dependency_graph", Op::Security(SecurityOp::GetDependencyGraph), "Every package the lockfiles resolve, direct or transitive"),
321 a("sbom", Op::Security(SecurityOp::GetSbom), "The dependency graph as an SPDX 2.3 document"),
322 a("compare_dependencies", Op::Security(SecurityOp::CompareDependencies), "What changes in dependencies between base...head"),
323 a("settings", Op::Security(SecurityOp::GetSettings), "A repository's security settings"),
324 a("update_settings", Op::Security(SecurityOp::UpdateSettings), "Change when checks fail and dependency review's policy"),
325 a("workspace_settings", Op::Security(SecurityOp::GetWorkspaceSettings), "A workspace's delegated bypass and validity checks"),
326 a("update_workspace_settings", Op::Security(SecurityOp::UpdateWorkspaceSettings), "Turn delegated bypass or validity checks on or off"),
327 a("overview", Op::Security(SecurityOp::GetOverview), "A workspace's alerts, trends and coverage"),
328 ],
329 },
330 Tool {
331 name: "notifications",
332 title: "Notifications",
333 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.",
334 default_action: Some("list"),
335 actions: &[
336 a("list", Op::ListNotifications, "Unread threads, latest first; all, a view, a reason, a repository"),
337 a("get", Op::GetNotificationThread, "One thread with its recent activity and your subscription"),
338 a("mark_read", Op::MarkThreadRead, "Mark a thread read, or unread"),
339 a("mark_all_read", Op::MarkNotificationsRead, "Mark everything read up to a time, or one repository's"),
340 a("done", Op::MarkThreadDone, "Mark a thread done; new activity brings it back"),
341 a("save", Op::SaveThread, "Save a thread, or unsave it"),
342 a("snooze", Op::SnoozeThread, "Snooze a thread until a time, or bring it back"),
343 a("subscription", Op::GetThreadSubscription, "Your subscription to an issue or pull request"),
344 a("subscribe", Op::SetThreadSubscription, "Subscribe to an issue or pull request, or ignore it"),
345 a("unsubscribe", Op::DeleteThreadSubscription, "Unsubscribe until you comment or are mentioned"),
346 a("watching", Op::GetRepoSubscription, "How you watch a repository"),
347 a("watch", Op::SetRepoSubscription, "Watch a repository: participating, all, ignore or custom"),
348 a("unwatch", Op::DeleteRepoSubscription, "Stop watching a repository"),
349 a("watched", Op::ListWatchedRepos, "Repositories you watch other than the default way"),
350 ],
351 },
352 Tool {
353 name: "account",
354 title: "Your account",
355 description: "Who this token acts as and its workspaces (`whoami`), your email addresses, your invites, and invitations to repositories waiting for you.",
356 default_action: Some("whoami"),
357 actions: &[
358 a("whoami", Op::Whoami, "Who the token acts as, and its workspaces"),
359 a("list_emails", Op::ListEmails, "Your addresses"),
360 a("add_email", Op::AddEmail, "Add an address"),
361 a("remove_email", Op::RemoveEmail, "Remove an address"),
362 a("update_email_settings", Op::UpdateEmailSettings, "Primary, backup and privacy"),
363 a("list_invites", Op::ListInvites, "Your invites to g1t"),
364 a("create_invite", Op::CreateInvite, "Make an invite"),
365 a("revoke_invite", Op::RevokeInvite, "Revoke one"),
366 a("list_repository_invitations", Op::ListMyRepoInvitations, "Invitations to repositories for you"),
367 a("accept_repository_invitation", Op::AcceptRepoInvitation, "Accept one"),
368 a("decline_repository_invitation", Op::DeclineRepoInvitation, "Decline one"),
369 ],
370 },
371];
372
373/// Operations that cannot be undone, or reach beyond g1t's own records:
374/// clients ask before running a tool that has any of them.
375fn destructive(op: Op) -> bool {
376 matches!(
377 op,
378 Op::Security(SecurityOp::DeleteCustomPattern | SecurityOp::BypassPushProtection)
379 | Op::DeleteWorkspace
380 | Op::UpdateWorkspace
381 | Op::DeleteRepo
382 | Op::PurgeRepo
383 | Op::TransferRepo
384 | Op::SetRepoVisibility
385 | Op::RemoveEmail
386 | Op::RemoveCollaborator
387 | Op::DisconnectIntegration
388 | Op::DeleteWebhook
389 | Op::DeleteActionsSecret
390 | Op::DeleteActionsVariable
391 | Op::SetActionsSecret
392 | Op::SetActionsVariable
393 | Op::SetModelRoutes
394 | Op::SetBasePermission
395 | Op::DeleteTeam
396 | Op::RemoveTeamRepo
397 | Op::MergePullRequest
398 | Op::RemoveRunner
399 | Op::DeleteRunnerGroup
400 | Op::UpdateRunnerSettings
401 )
402}
403
404/// Whether an operation only reads.
405pub fn reads_only(op: Op) -> bool {
406 NO_SCOPE.contains(&op.name())
407 || scope_for(op.name()).is_some_and(|scope| scope.level() == Level::Read)
408}
409
410/// What decides which actions a caller sees.
411pub enum Gate<'a> {
412 /// No limit beyond the person's own role.
413 Everything,
414 /// A g1t agent's token: the operations its run lists.
415 Agent(&'a AgentScope),
416 /// An access token with scopes.
417 Token(&'a TokenAccess),
418}
419
420impl Gate<'_> {
421 pub fn allows(&self, op: Op) -> bool {
422 match self {
423 Gate::Everything => true,
424 Gate::Agent(scope) => op.allowed_by(scope) && !NEVER.contains(&op.name()),
425 Gate::Token(access) => {
426 if NO_SCOPE.contains(&op.name()) {
427 return true;
428 }
429 match scope_for(op.name()) {
430 Some(scope) => access.allows(scope),
431 None => access.scopes.is_none(),
432 }
433 }
434 }
435 }
436}
437
438impl Tool {
439 pub fn by_name(name: &str) -> Option<&'static Tool> {
440 TOOLS.iter().find(|tool| tool.name == name)
441 }
442
443 pub fn action(&self, name: &str) -> Option<&'static Action> {
444 // The tools are 'static; find through TOOLS to keep the lifetime.
445 TOOLS
446 .iter()
447 .find(|tool| tool.name == self.name)
448 .and_then(|tool| tool.actions.iter().find(|action| action.name == name))
449 }
450
451 pub fn visible(&self, gate: &Gate) -> Vec<&'static Action> {
452 TOOLS
453 .iter()
454 .find(|tool| tool.name == self.name)
455 .map(|tool| tool.actions.iter().filter(|action| gate.allows(action.op)).collect())
456 .unwrap_or_default()
457 }
458
459 /// The flat input schema of the actions given.
460 pub fn input_schema(&self, actions: &[&Action]) -> Value {
461 let mut properties = Map::new();
462 let lines: Vec<String> = actions
463 .iter()
464 .map(|action| {
465 let required: Vec<String> = action.op.required();
466 if required.is_empty() {
467 format!("{}: {}.", action.name, action.summary)
468 } else {
469 format!("{} ({}): {}.", action.name, required.join(", "), action.summary)
470 }
471 })
472 .collect();
473 let mut action_schema = json!({
474 "type": "string",
475 "enum": actions.iter().map(|action| action.name).collect::<Vec<_>>(),
476 "description": lines.join("\n"),
477 });
478 if let Some(default) = self.default_action.filter(|name| actions.iter().any(|action| action.name == *name)) {
479 action_schema["default"] = json!(default);
480 }
481 properties.insert("action".to_owned(), action_schema);
482 for action in actions {
483 for (name, schema) in action.op.properties() {
484 merge_property(&mut properties, name, schema);
485 }
486 }
487 let mut required = vec![];
488 if self.default_action.is_none() {
489 required.push("action");
490 }
491 let mut schema = json!({ "type": "object", "properties": properties });
492 if !required.is_empty() {
493 schema["required"] = json!(required);
494 }
495 schema
496 }
497
498 /// The input schema keyed by action: one `oneOf` branch per action,
499 /// each with its own fields and the ones it needs.
500 pub fn discriminated(&self, actions: &[&Action]) -> Value {
501 let branches: Vec<Value> = actions
502 .iter()
503 .map(|action| {
504 let mut properties = Map::new();
505 properties.insert("action".to_owned(), json!({ "const": action.name }));
506 properties.extend(action.op.properties());
507 let mut required = vec![Value::String("action".to_owned())];
508 // The default action may leave `action` out.
509 if self.default_action == Some(action.name) {
510 required.clear();
511 }
512 required.extend(action.op.required().into_iter().map(Value::String));
513 json!({
514 "title": action.name,
515 "description": action.summary,
516 "type": "object",
517 "properties": properties,
518 "required": required,
519 })
520 })
521 .collect();
522 json!({ "type": "object", "oneOf": branches })
523 }
524
525 /// MCP's hints about the actions given: whether the tool only reads,
526 /// whether it can destroy something, and whether calling it twice is
527 /// the same as once.
528 pub fn annotations(&self, actions: &[&Action]) -> Value {
529 let read_only = actions.iter().all(|action| reads_only(action.op));
530 json!({
531 "title": self.title,
532 "readOnlyHint": read_only,
533 "destructiveHint": !read_only && actions.iter().any(|action| destructive(action.op)),
534 "idempotentHint": read_only,
535 "openWorldHint": false,
536 })
537 }
538
539 /// The tool as `tools/list` gives it, for a caller behind `gate`, or
540 /// `None` when it may use none of its actions.
541 pub fn listed(&self, gate: &Gate) -> Option<Value> {
542 let actions = self.visible(gate);
543 if actions.is_empty() {
544 return None;
545 }
546 Some(json!({
547 "name": self.name,
548 "title": self.title,
549 "description": self.description,
550 "inputSchema": self.input_schema(&actions),
551 "annotations": self.annotations(&actions),
552 }))
553 }
554}
555
556/// Adds a property to a tool's flat schema. The first action to use a name
557/// describes it; a later one with other allowed values adds them.
558fn merge_property(properties: &mut Map<String, Value>, name: String, schema: Value) {
559 match properties.get_mut(&name) {
560 None => {
561 properties.insert(name, schema);
562 }
563 Some(existing) => {
564 if let (Some(Value::Array(had)), Some(Value::Array(more))) =
565 (existing.get("enum").cloned(), schema.get("enum"))
566 {
567 let mut merged = had;
568 for value in more {
569 if !merged.contains(value) {
570 merged.push(value.clone());
571 }
572 }
573 existing["enum"] = Value::Array(merged);
574 }
575 // Different kinds of value under one name: say less, accept both.
576 if existing.get("type") != schema.get("type")
577 && let Some(fields) = existing.as_object_mut()
578 {
579 fields.remove("type");
580 fields.remove("items");
581 }
582 }
583 }
584}
585
586/// What a call to a tool runs: the operation its action names, or why not.
587pub fn resolve(tool: &Tool, arguments: &Value) -> Result<Op, String> {
588 let names = || {
589 tool.actions
590 .iter()
591 .map(|action| action.name)
592 .collect::<Vec<_>>()
593 .join(", ")
594 };
595 let Some(name) = arguments["action"].as_str().or(tool.default_action) else {
596 return Err(format!("Give an action: one of {}.", names()));
597 };
598 let Some(action) = tool.action(name) else {
599 return Err(format!("{} has no action {name}. Its actions: {}.", tool.name, names()));
600 };
601 let missing: Vec<String> = action
602 .op
603 .required()
604 .into_iter()
605 .filter(|field| arguments.get(field).is_none_or(Value::is_null))
606 .collect();
607 if !missing.is_empty() {
608 return Err(format!("{}.{name} needs {}.", tool.name, missing.join(", ")));
609 }
610 Ok(action.op)
611}
612
613#[cfg(test)]
614mod tests {
615 use super::*;
616 use g1t_contracts::scopes::{Preset, Scope};
617
618 fn listed(gate: &Gate) -> Vec<Value> {
619 TOOLS.iter().filter_map(|tool| tool.listed(gate)).collect()
620 }
621
622 fn token(scopes: Option<Vec<Scope>>) -> TokenAccess {
623 TokenAccess {
624 token_id: "tok_1".to_owned(),
625 scopes: scopes.map(|scopes| scopes.iter().map(|scope| scope.as_str().to_owned()).collect()),
626 legacy: false,
627 }
628 }
629
630 #[test]
631 fn every_operation_is_exactly_one_action_of_one_tool() {
632 for op in Op::ALL {
633 let count = TOOLS
634 .iter()
635 .flat_map(|tool| tool.actions.iter())
636 .filter(|action| action.op == op)
637 .count();
638 assert_eq!(count, 1, "{} is {count} actions", op.name());
639 }
640 for tool in TOOLS {
641 let mut names = std::collections::HashSet::new();
642 for action in tool.actions {
643 assert!(names.insert(action.name), "{}.{} twice", tool.name, action.name);
644 }
645 if let Some(default) = tool.default_action {
646 assert!(tool.action(default).is_some(), "{}", tool.name);
647 }
648 }
649 assert!(TOOLS.len() <= 16, "{} tools", TOOLS.len());
650 }
651
652 #[test]
653 fn every_operation_needs_exactly_one_scope_or_none() {
654 use g1t_contracts::scopes::OPERATIONS;
655 for op in Op::ALL {
656 let mapped = OPERATIONS.iter().filter(|(name, _)| *name == op.name()).count();
657 let free = NO_SCOPE.contains(&op.name());
658 assert_eq!(mapped + usize::from(free), 1, "{}", op.name());
659 }
660 for (name, _) in OPERATIONS {
661 assert!(Op::by_name(name).is_some(), "{name} is not an operation");
662 }
663 }
664
665 #[test]
666 fn each_tool_schema_is_valid_with_one_branch_per_action() {
667 for tool in TOOLS {
668 let actions: Vec<&Action> = tool.actions.iter().collect();
669 let flat = tool.input_schema(&actions);
670 assert_eq!(flat["type"], "object");
671 assert!(flat.get("oneOf").is_none(), "no oneOf at the top level");
672 let listed: Vec<&str> = flat["properties"]["action"]["enum"]
673 .as_array()
674 .unwrap()
675 .iter()
676 .map(|name| name.as_str().unwrap())
677 .collect();
678 assert_eq!(listed, tool.actions.iter().map(|action| action.name).collect::<Vec<_>>());
679 for action in tool.actions {
680 for field in action.op.required() {
681 assert!(flat["properties"].get(&field).is_some(), "{}.{}: {field}", tool.name, action.name);
682 }
683 }
684 let keyed = tool.discriminated(&actions);
685 let branches = keyed["oneOf"].as_array().unwrap();
686 assert_eq!(branches.len(), tool.actions.len());
687 for (branch, action) in branches.iter().zip(tool.actions) {
688 assert_eq!(branch["properties"]["action"]["const"], action.name);
689 for field in branch["required"].as_array().unwrap() {
690 assert!(branch["properties"].get(field.as_str().unwrap()).is_some(), "{}.{}: {field}", tool.name, action.name);
691 }
692 }
693 // A well-formed JSON Schema object throughout.
694 let text = serde_json::to_string(&flat).unwrap();
695 assert!(serde_json::from_str::<Value>(&text).is_ok());
696 }
697 }
698
699 #[test]
700 fn a_read_only_token_sees_read_actions_only() {
701 let access = token(Preset::ReadOnly.scopes());
702 let gate = Gate::Token(&access);
703 for tool in TOOLS {
704 for action in tool.visible(&gate) {
705 assert!(reads_only(action.op), "{}.{}", tool.name, action.name);
706 }
707 }
708 let tools = listed(&gate);
709 for tool in &tools {
710 assert_eq!(tool["annotations"]["readOnlyHint"], true, "{}", tool["name"]);
711 assert_eq!(tool["annotations"]["destructiveHint"], false);
712 }
713 let issue = tools.iter().find(|tool| tool["name"] == "issue").unwrap();
714 assert_eq!(issue["inputSchema"]["properties"]["action"]["enum"], json!(["list", "get", "labels"]));
715 // Nothing of the agent tool is a read.
716 assert!(!tools.iter().any(|tool| tool["name"] == "agent"));
717 }
718
719 #[test]
720 fn a_narrow_token_sees_only_its_tools() {
721 let access = token(Some(vec![Scope::IssuesWrite]));
722 let names: Vec<Value> = listed(&Gate::Token(&access)).into_iter().map(|tool| tool["name"].clone()).collect();
723 // Labels and milestones are the repository's, managed with issues:write.
724 assert_eq!(names, vec![json!("repository"), json!("issue"), json!("plan"), json!("account")]);
725 // Notifications are a resource of their own: reading them lists
726 // only what reads.
727 let reader = token(Some(vec![Scope::NotificationsRead]));
728 let tools = listed(&Gate::Token(&reader));
729 let notifications = tools.iter().find(|tool| tool["name"] == "notifications").unwrap();
730 assert_eq!(
731 notifications["inputSchema"]["properties"]["action"]["enum"],
732 json!(["list", "get", "subscription", "watching", "watched"])
733 );
734 assert_eq!(notifications["annotations"]["readOnlyHint"], true);
735 let full = token(None);
736 assert_eq!(listed(&Gate::Token(&full)).len(), TOOLS.len());
737 assert_eq!(listed(&Gate::Everything).len(), TOOLS.len());
738 }
739
740 #[test]
741 fn a_tool_that_can_destroy_says_so() {
742 let tools = listed(&Gate::Everything);
743 let repository = tools.iter().find(|tool| tool["name"] == "repository").unwrap();
744 assert_eq!(repository["annotations"]["destructiveHint"], true);
745 assert_eq!(repository["annotations"]["readOnlyHint"], false);
746 let memory = tools.iter().find(|tool| tool["name"] == "memory").unwrap();
747 assert_eq!(memory["annotations"]["destructiveHint"], false);
748 }
749
750 #[test]
751 fn calls_resolve_to_their_operation_or_say_what_is_missing() {
752 let issue = Tool::by_name("issue").unwrap();
753 assert_eq!(resolve(issue, &json!({ "action": "get", "repo": "a/b", "number": 1 })), Ok(Op::GetIssue));
754 assert_eq!(resolve(issue, &json!({ "action": "get", "repo": "a/b" })), Err("issue.get needs number.".to_owned()));
755 assert!(resolve(issue, &json!({})).unwrap_err().starts_with("Give an action"));
756 assert!(resolve(issue, &json!({ "action": "explode" })).unwrap_err().contains("no action explode"));
757 let search = Tool::by_name("search").unwrap();
758 assert_eq!(resolve(search, &json!({ "query": "x" })), Ok(Op::Search));
759 let account = Tool::by_name("account").unwrap();
760 assert_eq!(resolve(account, &json!({})), Ok(Op::Whoami));
761 }
762
763 #[test]
764 fn teams_are_one_tool_and_a_workspace_reader_sees_only_its_reads() {
765 let team = Tool::by_name("team").unwrap();
766 let names: Vec<&str> = team.actions.iter().map(|action| action.name).collect();
767 assert_eq!(
768 names,
769 [
770 "list",
771 "get",
772 "create",
773 "update",
774 "delete",
775 "list_members",
776 "set_member",
777 "remove_member",
778 "list_child_teams",
779 "list_repos",
780 "set_repo",
781 "remove_repo",
782 "set_review_assignment",
783 "list_user_teams",
784 ]
785 );
786 let reader = token(Some(vec![Scope::WorkspaceRead]));
787 let tools = listed(&Gate::Token(&reader));
788 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
789 assert_eq!(
790 listed_team["inputSchema"]["properties"]["action"]["enum"],
791 json!(["list", "get", "list_members", "list_child_teams", "list_repos", "list_user_teams"])
792 );
793 assert_eq!(listed_team["annotations"]["readOnlyHint"], true);
794 // A team's role on a repository is who has access.
795 let admin = token(Some(vec![Scope::WorkspaceAdmin]));
796 let tools = listed(&Gate::Token(&admin));
797 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
798 let actions = listed_team["inputSchema"]["properties"]["action"]["enum"].as_array().unwrap();
799 assert!(actions.contains(&json!("set_review_assignment")) && !actions.contains(&json!("set_repo")));
800 let access = token(Some(vec![Scope::AccessAdmin]));
801 let tools = listed(&Gate::Token(&access));
802 let listed_team = tools.iter().find(|tool| tool["name"] == "team").unwrap();
803 assert_eq!(listed_team["inputSchema"]["properties"]["action"]["enum"], json!(["set_repo", "remove_repo"]));
804 // Both kinds of role a schema names are offered.
805 let roles = &listed(&Gate::Everything).into_iter().find(|tool| tool["name"] == "team").unwrap()["inputSchema"]
806 ["properties"]["role"]["enum"];
807 for role in ["member", "maintainer", "read", "admin"] {
808 assert!(roles.as_array().unwrap().contains(&json!(role)), "{role}");
809 }
810 assert_eq!(
811 resolve(team, &json!({ "action": "set_repo", "workspace": "acme", "team": "backend", "repo": "rocket" })),
812 Err("team.set_repo needs role.".to_owned())
813 );
814 }
815
816 #[test]
817 fn reviewers_and_code_owners_are_actions_of_their_tools() {
818 let pull = Tool::by_name("pull_request").unwrap();
819 assert_eq!(
820 resolve(pull, &json!({ "action": "request_reviewers", "repo": "a/b", "number": 1, "team_reviewers": ["backend"] })),
821 Ok(Op::RequestReviewers)
822 );
823 assert_eq!(pull.action("remove_requested_reviewers").map(|action| action.op), Some(Op::RemoveRequestedReviewers));
824 let repository = Tool::by_name("repository").unwrap();
825 assert_eq!(resolve(repository, &json!({ "action": "codeowners", "repo": "a/b" })), Ok(Op::GetCodeownersErrors));
826 assert!(reads_only(Op::GetCodeownersErrors));
827 assert!(!reads_only(Op::RequestReviewers));
828 }
829
830 /// How much smaller `tools/list` is than one tool per operation. Run
831 /// with `--nocapture` to see the numbers.
832 #[test]
833 fn the_tool_list_is_much_smaller_than_one_tool_per_operation() {
834 let before: Vec<Value> = Op::ALL
835 .into_iter()
836 .map(|op| json!({ "name": op.name(), "description": op.description(), "inputSchema": op.input() }))
837 .collect();
838 let after = listed(&Gate::Everything);
839 let before_bytes = serde_json::to_string(&json!({ "tools": before })).unwrap().len();
840 let after_bytes = serde_json::to_string(&json!({ "tools": after })).unwrap().len();
841 let agent = token(Preset::Agent.scopes());
842 let agent_bytes = serde_json::to_string(&json!({ "tools": listed(&Gate::Token(&agent)) })).unwrap().len();
843 let read = token(Preset::ReadOnly.scopes());
844 let read_bytes = serde_json::to_string(&json!({ "tools": listed(&Gate::Token(&read)) })).unwrap().len();
845 println!(
846 "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)",
847 before.len(),
848 before_bytes / 4,
849 after.len(),
850 after_bytes / 4,
851 agent_bytes / 4,
852 read_bytes / 4,
853 );
854 assert!(after_bytes * 2 < before_bytes, "{after_bytes} vs {before_bytes}");
855 }
856}