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crewAI/docs/en/ai/tools/reference.mdx
2026-02-19 11:26:06 -08:00

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---
title: "Tools: Reference"
description: "Reference for tool invocation contracts, argument schemas, and runtime safeguards."
icon: "book"
mode: "wide"
---
## Tool contract
- deterministic input schema
- stable output schema
- explicit error behavior
## Runtime safeguards
- timeout and retry policy
- idempotency for side effects
- validation before commit
## Canonical source
Primary API details live in [/en/concepts/tools](/en/concepts/tools).