Explanation
Hint: Identify the requirement first, then choose the approach that addresses the main constraints, trade-offs, failure modes, security, cost, and verification.
Correct answer: Separate model reasoning from tools; Least-privilege tool access; Argument validation and policy checks; Step and cost limits; Observability and human escalation
Key reasoning:
- Separate model reasoning from tools
- Least-privilege tool access
- Argument validation and policy checks
- Step and cost limits
- Observability and human escalation
Why the alternatives are weaker:
- Jumping to a technology before clarifying the problem
- Explaining the solution without the reasoning or trade-offs
- Omitting verification, failure handling, or prevention
What the interviewer is testing
- Requirements and constraints
- Architecture and trade-offs
- Reliability, security, cost, and operations
What a Strong Answer Should Cover
- Separate model reasoning from tools
- Least-privilege tool access
- Argument validation and policy checks
- Step and cost limits
- Observability and human escalation
Common Mistakes
- Jumping to a technology before clarifying the problem
- Explaining the solution without the reasoning or trade-offs
- Omitting verification, failure handling, or prevention
Interviewer Follow-ups
- What tools should the agent never be allowed to call?
- How do you constrain a runaway workflow?
- Where should a human approve actions?
Real-World Sample Answer
A strong real-world response should connect requirements to engineering decisions, explain why the chosen approach fits the constraints, and make failure, security, cost, observability, and verification explicit.
