You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.257,
ImprovementsSection of the release
Publishing or declaring capabilities now surfaces a distinct host_unavailable error when a name refers to a locally-configured MCP server rather than a claude.ai connector. The error explains that host-configured servers aren't available in that session and points to using the connector's display name instead, or clearing the mcp capability.
