// AI news · 2026-11-12 · AWS Machine Learning Blog
Fine-grained access control for Bedrock KB tools
AWS implements fine-grained access control for AI agents using Amazon Bedrock AgentCore Gateway.
Published 2026-11-12 23:40 (Beijing time)Source AWS Machine Learning BlogAuto-summarised, fact-checked against source
01Summary
User identity is injected into tool calls via a request interceptor, validated by AgentCore policy, and enforced at the knowledge base level through resource-based policies. This prevents LLMs from deciding search context and avoids unauthorized data exposure in multi-tenant agent applications.
Summarised from the original article by an open-source model, then checked automatically: every number and English name must appear in the source. The original article is authoritative.
02Key points
- User identity is injected into tool calls via a request interceptor.
- AgentCore policy independently validates user context against authenticated identity.
- Managed Knowledge Base enforces access using resource-based policies and ACL awareness.
- Prevents LLMs from dynamically determining search subject during runtime.
03Source
Fine-grained access control for Amazon Bedrock Managed Knowledge Base tools
AWS Machine Learning Blog · published 2026-11-12 23:40 Beijing time
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