Briefly drops all live MCP connections. The grace window below lets in-flight requests finish before the restart fires — Cancel to abort, or Restart now to skip the wait.
This is a real identity change — unlike the cosmetic display
name. The endpoint URL becomes /<new name>/mcp, the gateway hot-mounts that route, and the
client registration changes from gateway-<old> to gateway-<new> —
registered clients must be updated or the server disappears from them.
Run the saved definition against its live resolved members without changing activation state.