MCP 2025-11-25
SUPERSEDED Confidence: High (1.00)MCP 2025-11-25 is a superseded revision of the Model Context Protocol specification, released 2025-11-25.
What is MCP specification revision 2025-11-25?
MCP 2025-11-25 is a superseded revision of the Model Context Protocol specification, released 2025-11-25.
Added OpenID Connect discovery, icons metadata, incremental scope consent, URL mode elicitation, tool calling in sampling, Client ID Metadata Documents as a recommended registration mechanism, and experimental tasks.
What changed in MCP 2025-11-25?
- Authorization server discovery via OpenID Connect Discovery 1.0
- Icons metadata for tools, resources, resource templates, and prompts
- Incremental scope consent via WWW-Authenticate
- Standards-based elicitation enums and URL mode elicitation
- Tool calling support in sampling (tools and toolChoice parameters)
- OAuth Client ID Metadata Documents as a recommended client registration mechanism
- Experimental tasks for durable requests with polling
- Formalized governance structure, working groups, and SDK tiering
MCP 2025-11-25 was the last stateful revision of the protocol. It focused on authorization ergonomics (OIDC discovery, incremental scope consent, Client ID Metadata Documents), richer client interactions (URL mode elicitation, sampling with tool calls), and the experimental tasks utility that later became the tasks extension. This revision also formalized MCP governance, working groups, and the SDK tiering system.
How was this verified, and what are the sources?
Verified · method: spec-changelog
· confidence 1.00 (High).