Update MCP protocol expert agent for 2025-11-25 spec#4099
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Deep-dive review of the MCP 2025-11-25 specification revealed several gaps in the agent's protocol knowledge. This update ensures the agent has accurate, comprehensive guidance covering all spec sections. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #4099 +/- ##
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Coverage 68.56% 68.56%
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Files 448 448
Lines 45779 45779
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Hits 31389 31389
+ Misses 11967 11966 -1
- Partials 2423 2424 +1 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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reyortiz3
approved these changes
Mar 11, 2026
rdimitrov
approved these changes
Mar 11, 2026
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Summary
The MCP protocol expert agent had several gaps compared to the actual 2025-11-25 specification. A full deep-dive review of every spec page (overview, transports, lifecycle, tasks, elicitation, tools, authorization, security best practices, schema) revealed missing protocol details that could lead the agent to give incomplete or incorrect guidance.
Key areas updated:
retryfield, session DELETE,Acceptheader requirement, protocol version fallback rulesclientInfo/serverInfofields (title,description,icons,websiteUrl), per-request timeout configurationinput_requiredhandling, task security (context binding, access control), error codes,tasks/resultsemanticsoutputSchema,structuredContent,title,icons,execution.taskSupport,AudioContent, tool name constraints_metakey format (reverse DNS prefix), JSON Schema 2020-12 default, content types withAudioContent, icon specificationllms.txtindex and TypeScript schema source of truthType of change
Test plan
Reviewed every section of the updated file against the fetched spec pages to verify accuracy. Cross-referenced all URLs. Verified the file parses correctly as a Claude Code agent definition.
Does this introduce a user-facing change?
No. This only affects the MCP protocol expert AI subagent's knowledge base.
Generated with Claude Code