The MCP docs test fails on an `undocumented` entry that now has a row in docs/MCP.md, and the stale entries leave #5397

For: the undocumented set in test/mcp-docs.test.ts stays truthful as #5280–#5288 add rows, the same discipline as the OpenAPI list.

Done:

• [ ] A case expects no name in undocumented to have a row in docs/MCP.md, and names each stale one to delete. It also expects every name to be a tool tools/list answers.
• [ ] Any stale entries on main are deleted in the same pull.
• [ ] The comment above the set says the test fails until a documented tool's line is deleted.

Files: test/mcp-docs.test.ts only. Risk: the docs issues edit this set in parallel. Delete only names documented on main when you start, and rebase before pushing.