Cruxial Blog

Field notes on agent reliability

Writing from the team building Cruxial, the action layer for AI agents. Notes on reliability, verification, and what actually happens when agents take real actions in the world.

Jul 13, 20266 min read

Silent Tool Failures: Why Your AI Agent Says "Done" When Nothing Happened

A silent tool failure is when an agent reports success but the tool call never fired or did nothing. What tool-call receipts are, and how receipt verification catches the failure schema validation can't.

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