Microsoft expands AI security tools as enterprises face insider threat risks from agents

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Microsoft expands AI security tools

Highlights

Microsoft launched Guardian Agents under Project Perception and added agent detection to Defender, targeting risks from internal enterprise AI agents.
New Microsoft security tools now identify up to 60 types of AI agents in workplaces, supporting separation of AI development from oversight systems.
Microsoft joined Nvidia’s Open Agent Safety Platform, reflecting industry momentum to isolate AI agents in secure environments and improve behavioral monitoring.

New controls target enterprise AI agent use

As reported by TechCrunch, Microsoft on Monday unveiled new security features for enterprises, including Guardian Agents, a tool designed to monitor the AI agents a company uses.

Guardian Agents is part of Project Perception, which Microsoft introduced in June as a response to powerful hacking models such as Anthropic’s Mythos and Fable and OpenAI’s security vulnerability scanning system Daybreak. The project was initially built on the assumption that AI-driven attacks would come from outside an organization, but Microsoft is now placing greater emphasis on risks posed by agents already operating inside corporate environments.

Microsoft CEO Satya Nadella writes in his private blog earlier this month that enterprises need to stop relying on trust in AI model providers alone and instead put separate control systems in place to monitor the agents launched by those labs. Hayete Gallot, who leads Microsoft’s security business, says frontier models cannot be trusted because of their unpredictability and their access to sensitive data and tools.

Broader industry shift toward agent oversight

Alongside Guardian Agents, Microsoft adds an agent detection capability to Microsoft Defender that can identify as many as 60 types of agents employees may be using in the workplace. The new products support Microsoft’s strategy of separating the supply of AI intelligence from the systems used to control and supervise it.

That approach is also gaining momentum across the wider AI industry. Microsoft is a founding member of Nvidia’s Open Agent Safety Platform, an initiative focused on isolating agents in secure environments and monitoring their behavior, as companies look for stronger governance over increasingly capable AI systems.

Our earlier report on Cohere’s planned acquisition of AI cybersecurity startup AISLE highlighted how AI labs are expanding into enterprise-grade security, adding automated software vulnerability detection to broader AI platforms. We noted that the deal would also strengthen Cohere’s European footprint via AISLE’s Prague engineering hub, underscoring the growing focus on securing AI systems as their capabilities—and associated risks—scale up in corporate environments.

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