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How to secure the actual behavior of Bedrock AgentCore agents
Cato AI Labs points out that Amazon Bedrock AgentCore's native access controls cannot prevent prompt injection; content exchanged between agents and models must be inspected at four stages: prompts, tool calls, tool responses, and outputs. AgentCore Policy uses Cedar rules to intercept tool calls that go through the Gateway, but tools that developers write directly into code do not pass through the Gateway and are therefore not inspected. Cato's Amazon Bedrock integration discovers all agents on AgentCore in a read-only manner and covers agents on AWS, Microsoft Foundry, Amazon Quick, and developer-built endpoints.
changed between agents and models must be inspected at four stages: prompts, tool calls, tool responses, and outputs. AgentCore Policy uses Cedar rules to intercept tool calls that go through the Gateway, but tools that developers write directly into code do not pass through the Gateway and are therefore not inspected. Cato's Amazon Bedrock integration discovers all agents on AgentCore in a read-only manner and covers agents on AWS, Microsoft Foundry, Amazon Quick, and developer-built endpoints.
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Grok Models Launch in Copilot Apps
Microsoft Copilot announced that Grok models from SpaceXAI are gradually rolling out in Copilot for Word, Excel, and PowerPoint, starting with customers in the Microsoft Frontier program. The official Grok account reposted the news and invited users to try it out.
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