MCP Schema Versioning: Keep AI Tool Calls Working Through API Changes
This story is from 2026-10-22. It is preserved in the archive; the latest stories are on the live feed.
An agent that worked yesterday can start failing after a change that looks harmless in a pull request: rename location to query , make a field required, or reshape a result object. The model has not suddenly become worse. It is still following the tool contract it saw before the deployment. That is…
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- 2026-10-22 03:29 · DEV Community — AI
MCP Schema Versioning: Keep AI Tool Calls Working Through API Changes