Your MCP server changed last night. Your agent didn't notice.
This story is from 2026-09-28. It is preserved in the archive; the latest stories are on the live feed.
TL;DR: An MCP server can change what its tools say after you approve it. Your agent reads the new description as instructions. Pattern-matching those descriptions misses things; checking "did this change since approval?" doesn't. Tool descriptions are prompts When Claude Code, Cursor or Codex conne…
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- 2026-09-28 18:27 · DEV Community — AI
Your MCP server changed last night. Your agent didn't notice.
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