Invalidate Cached Tool Results on Change
Cache tool results without serving stale answers. Covers why a time-based expiry alone is not enough, how to build an invalidation key from the tool name plus normalized arguments plus the version of the underlying resource, request coalescing so a cold key does not stampede the upstream service, what to do when the cache backend itself is down, and how to log invalidations so cache-versus-source drift can be audited later.
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Two clocks, not one, keep a cached tool result honest
Invalidate Cached Tool Results on Change# Two clocks, not one A tool-result cache stops being an optimisation the moment the answer beneath it moves. A lifetime bounds how long you are willing to keep a copy; it says nothing about whether the fact is still true. The failure mode is quiet: the entry is young, the read is fast, and the val
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