spec-watch · spec-release
MCP Protocol Revision 2025-11-25
A representative Spec Watch entry for the current protocol revision and its primary implementation-impact areas.
The current protocol revision is 2025-11-25. Its published changelog highlights authorization discovery, incremental scope consent, metadata icons, tool-name guidance, elicitation updates, polling behavior, and JSON Schema 2020-12 as the default schema dialect.
Why it matters
Implementers should review feature-specific changes rather than treating a version label as a complete compatibility claim. Authorization and schema behavior deserve particular attention when moving from the prior revision.