least privilege

OWASP LLM06 is where AI security stops being novel and becomes a least-privilege problem, which is exactly why interviewers love it. The control list is short; knowing which control to lead with is the test.

When agents call agents, one agent's output is another's untrusted input, and a single injected instruction can propagate across the whole graph with accumulated privileges. The strong answer treats every inter-agent edge as a trust boundary and bounds privilege per agent, not per system.

An agent with write access to a CRM, a chat tool, and an HR system is one bad tool call from emailing salaries to a channel. Safety is least-privilege scopes, a hard read/write split, human approval on destructive actions, and an audit log of everything.

Candidates treat computer-use agents like API agents with a screenshot. The interviewer is probing the new visual attack surface (hidden text, off-viewport UI, injected images) and how containment changes when the agent drives a real customer desktop. Most miss the per-turn-approval trap.