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MCP-DSC-003

Advertised versions include a currently-supported revision

This rule's verbatim spec quote hasn't been captured yet — see validator/README.md. It is not yet counted toward coverage or graded.

How to fix this

Make sure `supportedVersions` includes at least one revision that is still current. A list containing only retired revisions leaves a modern client with nothing it can select.

Check your own server against MCP-DSC-003

Probe P1.1 checks MCP-DSC-003 in the same request as 8 other rules, so one run shows your server's result for this rule next to the rest. Validate a server or read how the validator works.

Background on this topic: server/discover explained.

Other Discovery and capabilities rules

  • MCP-DSC-001server/discover is implemented
  • MCP-DSC-002DiscoverResult advertises supported protocol versions
  • MCP-DSC-004Extension identifiers use a valid non-reserved reverse-DNS prefix
  • MCP-DSC-005Results carry io.modelcontextprotocol/serverInfo in _meta