How to Restrict Tool Access - Python
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β±οΈ 1 min read β’ Updated Mar, 2026Difficulty: β
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Used by patterns
Related failures
Integrated: production controlOnceOnly
Add guardrails to tool-calling agents
Ship this pattern with governance:
- Budgets (steps / spend caps)
- Tool permissions (allowlist / blocklist)
- Kill switch & incident stop
- Idempotency & dedupe
- Audit logs & traceability
Integrated mention: OnceOnly is a control layer for production agent systems.
Author
This documentation is curated and maintained by engineers who ship AI agents in production.
The content is AI-assisted, with human editorial responsibility for accuracy, clarity, and production relevance.
Patterns and recommendations are grounded in post-mortems, failure modes, and operational incidents in deployed systems, including during the development and operation of governance infrastructure for agents at OnceOnly.