Decouple Tool-Access Security from Your Agent's Core Application Code
AWS · Policy & Safety · · notable
Briefing for: Engineering
What happened
Amazon Bedrock's AgentCore Policy is now GA, allowing you to define tool-access and input validation rules outside of your agent's logic. These policies use the Cedar language and are enforced at the AgentCore Gateway level, intercepting and evaluating every agent-to-tool request before it is executed.
Why it matters
This architectural shift means you no longer have to hardcode safety checks or complex permission logic inside your agent functions. You can manage security as configuration rather than code, enabling faster iterations and cleaner logic in your AI agents while maintaining strict adherence to the principle of least privilege.
What this enables
- If you have complex tool-calling agents, you can now restrict specific tool access based on user context without updating the agent's code.
- If you use Cedar for AWS-wide permissions, you can now extend that same logic to govern Bedrock agent actions for consistent cross-service governance.
- If you need to validate tool inputs for safety, you can apply global validation rules at the Gateway level to prevent prompt injection from reaching downstream systems.
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