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Interview question · Agent, Tool & MCP Security

What are the security risks of agents that operate a browser or a desktop, and how do you contain them?

Distinguish profile, device and account boundaries, then bind UI actions to the intended app, recipient and effect. Screenshots and accessibility trees provide observations, not trusted authorization.

hardNewUpdated Nov 2026

Distinguish profile, device and account boundaries, then bind UI actions to the intended app, recipient and effect. Screenshots and accessibility trees provide observations, not trusted authorization.

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  1. 01 State the assumptions your answer depends on.
  2. 02 Explain the mechanism and choose a control.
  3. 03 Name a condition that would change your decision.

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What if · the follow-ups in this answer

The answer works through 4 follow-ups like an interviewer would

Mina asks Alder’s computer-use agent to prepare expense report R8. She later approves submission of R8 to reviewer Aria.

  1. Does a separate browser profile isolate the agent from all host data?
  2. What if the selected report changes to R9 before the click?
  3. What if the page stops responding after submission?
  4. What should a safe workflow demonstration include?

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