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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"update_pull_request: `reviewers` field silently ignores team slugs","articleBody":"\nThe `update_pull_request` tool's `reviewers` field silently ignores team reviewer slugs (e.g., `ORG/team-slug`). No error is returned, but the teams are not added as reviewers on the pull request.\n\n## Steps to Reproduce\n\n1. Create a pull request in an organization repository\n2. Call `update_pull_request` with `reviewers` set to team slugs:\n   ```json\n   {\n     \"owner\": \"MY-ORG\",\n     \"repo\": \"my-repo\",\n     \"pullNumber\": 123,\n     \"reviewers\": [\"MY-ORG/my-team\"]\n   }\n   ```\n3. Verify review requests on the PR — they are empty\n\n## Expected Behavior\n\nEither:\n- The `reviewers` field should support team slugs (in `ORG/team-slug` format) and correctly call the GitHub API's `team_reviewers` parameter, OR\n- A separate `team_reviewers` field should be exposed on the tool, OR\n- An error should be returned indicating that team slugs are not supported\n\n## Actual Behavior\n\nThe tool returns a success response but no team review requests are created. The failure is silent.\n\nNotably, when passing an **invalid individual username**, the API correctly returns a 422 error:\n```\nReviews may only be requested from collaborators. One or more of the users or teams you specified is not a collaborator of the repository.\n```\n\nBut team slugs are silently dropped before reaching the API — no error is surfaced.\n\n## Environment\n\nTested and reproduced on:\n- **GitHub Enterprise Server (GHES) 3.19.4**\n- **GitHub Enterprise Cloud** (EU data residency, `ghe.com`)\n\nMCP server version: `ghcr.io/github/github-mcp-server:latest` (pulled 2025-05-07, digest `sha256:2ac27ef03461ef2b877031b838a7d1fd7f12b12d4ace7796d8cad91446d55959`)\n\n## Workaround\n\nUsing the `gh` CLI works correctly:\n```\ngh pr edit 123 --add-reviewer ORG/team-slug\n```\n\n## Context\n\nThe GitHub REST API for [[requesting reviewers](https://docs.github.com/en/rest/pulls/review-requests#request-reviewers-for-a-pull-request)](https://docs.github.com/en/rest/pulls/review-requests#request-reviewers-for-a-pull-request) distinguishes between `reviewers` (array of user logins) and `team_reviewers` (array of team slugs). The MCP server tool currently only exposes a single `reviewers` field described as \"GitHub usernames to request reviews from\", with no support for teams.","author":{"url":"https://github.com/dastrobu","@type":"Person","name":"dastrobu"},"datePublished":"2026-05-07T14:55:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2440/github-mcp-server/issues/2440"}