Microsoft admits ‘frontier models can’t be trusted’, unveils new security tools to treat AI agents as insider threats

• Microsoft unveils Guardian Agents to monitor, constrain, and manage risks posed by autonomous AI agents
• New controls dynamically adjust agent permissions, behavior, and access based on changing risk levels
• Company warns “agentic insiders” require continuous AI-driven oversight beyond traditional security controls

AI fans, your vocabulary is about to become two phrases richer: Agentic Insider, and Guardian Agent. These are the two phrases Microsoft used while announcing a swathe of new tools and features to help businesses secure their operations running AI agents.

A new Microsoft blog, published by Microsoft’s Corporate VP for Identity and Network Access, Nadim Abdo, argues that agents, while not inherently malicious, can make mistakes or be manipulated and compromised.