# Microsoft warns enterprises: AI agents are insider threats

> Microsoft says frontier AI models cannot be trusted and launches Guardian Agents to monitor the AI systems companies deploy.
- Title: Microsoft warns enterprises: AI agents are insider threats
- Summary: Microsoft says frontier AI models cannot be trusted and launches Guardian Agents to monitor the AI systems companies deploy. Microsoft launched Guardian…
- Keywords: microsoft, ai agents, enterprise security, frontier models, guardian agents, project perception, satya nadella, ai safety, technology, startups, warns, enterprises
- Source: TechCrunch — https://techcrunch.com/2026/10/19/microsoft-says-ai-agents-are-like-insider-threats-as-frontier-models-cant-be-trusted
- Author: Julie Bort
- Published: 2026-10-19T22:04:28+00:00
- Read time: 1 min
- Topics: microsoft, ai agents, enterprise security, frontier models, guardian agents, project perception, satya nadella, ai safety, technology, startups
## Microsoft launches agent security feature
Microsoft introduced Guardian Agents on Monday, a new security feature designed to monitor the AI agents that enterprises deploy and use.
## Guardian Agents builds on Project Perception
Guardian Agents is part of Project Perception, a product Microsoft introduced in June with red, blue and green teams to test and fix AI vulnerabilities.
## Microsoft shifts focus to internal threats
Project Perception originally assumed AI hackers would come from outside companies. But Microsoft CEO Satya Nadella now warns that deployed AI agents themselves pose insider threat risks.
## Nadella: stop trusting AI model providers
In his private blog earlier this month, Nadella warned enterprises to stop trusting AI model providers and implement separate systems to watch and control agents.

> We need to separate the supply of intelligence from the authority over it.
## Frontier models cannot be trusted
Microsoft security chief Hayete Gallot stated frontier models cannot be trusted because they are unpredictable and trained to achieve tasks, not follow organizational norms.

> Unfortunately, frontier models, regardless of their origin, cannot be trusted.
## Microsoft's broader security strategy
Beyond Guardian Agents, Microsoft added agent detection to Microsoft Defender, features limiting agent data access, and dynamic permission adjustments requiring human approval for risky decisions.
## Industry adopts agent safety standards
Microsoft joined Nvidia's Open Agent Safety Platform, supported by more than one hundred other tech companies, which isolates agents and can monitor and stop behavior through hardware.
## Microsoft launches agent-focused hardware
Microsoft announced new Surface Laptop Ultra PCs built for agents, running on Nvidia chips with agent security and controls built in to the hardware.
## Key takeaway

Microsoft launched Guardian Agents to monitor AI systems enterprises deploy, arguing frontier models are unpredictable and pose insider threat risks.