Security Copilot agents cut alert noise: keep a human in the loop

🚨 The Signal: Microsoft is shipping autonomous security agents -- the Conditional Access Optimization Agent in Entra (now GA), plus Defender and Purview triage agents. They cut alert noise, but each runs with standing access and needs human review before you trust its recommendations.

The Impact

Triage agents prioritise alerts and suggest policy changes, but over-trusting their output or their standing permissions widens your blast radius.

• SOC teams: triage agents prioritise alerts but can mis-rank novel threats.
• Entra admins: the CA Optimization Agent suggests policy changes -- review before applying.
• Risk: over-trusting agent output; standing agent permissions widen the blast radius.

The Action

1. Pilot the Conditional Access Optimization Agent in report-only before enforcing its suggestions.
2. Keep a human approval gate on every agent-recommended policy or remediation.
3. Scope each security agent identity to least privilege in Microsoft Entra.
4. Monitor agent actions in Microsoft Defender XDR and the unified audit log.

Domain: Defender · Impact: medium · Workload: Microsoft Defender · Essential Eight: Restrict Administrative Privileges