update_issue can't change issue priority

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
74/100
Issue type
Feature
Clarity
Clearly specified
Activity status
Active
Tech stack
typescript
Domain
api, backend

Research direction

Start with packages/mcp-core/src/tools/catalog/update-issue.ts to trace the input schema and handler, then follow the request through packages/mcp-core/src/api-client/client.ts and the referenced Sentry API priority handling. Add priority support to the update path and account for the API's 400 response when the issue type disallows manual priority changes. Done when an agent can set low, medium, or high priority without changing status or assignment, and unsupported issue types return a clear error.

Written by the indexing model from the issue text.

Description

update_issue has no priority input, so agents can't set an issue's priority (low/medium/high) without also changing status or assignment. Reported through MCP user feedback (Cursor, server 0.42.0): an agent asked to set an issue's priority to low was blocked.

  • The input schema has no priority field (packages/mcp-core/src/tools/catalog/update-issue.ts:908-925), and the handler rejects any call without status or assignedTo (update-issue.ts:951-955; hint at :896).
  • ApiService.updateIssue doesn't send priority either (packages/mcp-core/src/api-client/client.ts:4114-4140).
  • The Sentry API already supports it on the issue PUT endpoint: GroupValidator.priority is a ChoiceField over PriorityLevel (getsentry/sentry src/sentry/api/helpers/group_index/validators/group.py:53-60), and update_groups applies it with handle_priority, which also sets priority_locked_at (src/sentry/api/helpers/group_index/update.py:256-270, :1021-1037).
  • The API returns 400 "Cannot manually set priority of one or more issues." for issue types without enable_user_status_and_priority_changes (update.py:257-263).

Feedback: MCP-SERVER-GND

via Sentry.

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