You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.242,
ImprovementsSection of the release
What
Publishing an artifact that declares MCP capabilities incorrectly now gets a specific diagnosis and remedy for each case instead of a generic rejection.
Details
Covers: the declaration not being an object, no servers listed, no tools listed, a connector id used where a server name belongs, a tool name in the server slot, and a name that cannot be declared until it is renamed in claude.ai.
Evidence
is a connector id, which no viewer can resolve
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
