Operations Agent 28 Tools Question Explained
This worked AI Engineer Interview practice question tests System Reasoning. Try the answer first, then review why A is the best choice.
Short answer
The correct answer is A. Which tool pairs get confused, and whether errors are routing mistakes or execution failures — retries only address the latter..
Routing errors and execution errors have different fixes — a router exposing a relevant subset versus retries on transient failures — so the confusion matrix decides the architecture. The key is to match the exact action in the prompt to the tool, command, or concept that performs that action directly. Here, A. Which tool pairs get confused, and whether errors are routing mistakes or execution failures — retries only address the latter. is the only option that satisfies the scenario without adding unrelated behavior.
The Question
An operations agent has 28 tools and picks the wrong one often enough to need manual cleanup. The platform team proposes longer tool descriptions plus five retries. What do you measure before accepting any fix?
Why A is correct
Routing errors and execution errors have different fixes — a router exposing a relevant subset versus retries on transient failures — so the confusion matrix decides the architecture. The key is to match the exact action in the prompt to the tool, command, or concept that performs that action directly. Here, A. Which tool pairs get confused, and whether errors are routing mistakes or execution failures — retries only address the latter. is the only option that satisfies the scenario without adding unrelated behavior.
Why the other options are wrong
Option B does not match the requirement in the prompt. The correct answer is A because Routing errors and execution errors have different fixes — a router exposing a relevant subset versus retries on transient failures — so the confusion matrix decides the architecture.
Option C does not match the requirement in the prompt. The correct answer is A because Routing errors and execution errors have different fixes — a router exposing a relevant subset versus retries on transient failures — so the confusion matrix decides the architecture.
Option D does not match the requirement in the prompt. The correct answer is A because Routing errors and execution errors have different fixes — a router exposing a relevant subset versus retries on transient failures — so the confusion matrix decides the architecture.
Key idea: System Reasoning
Every question is a production situation an AI engineer interviewer can put to you: a failing endpoint, a cost spike, an agent that loops, an eval that disagrees with users. The best answer is almost always the one that measures or contains the problem before it changes the model or the prompt. If you miss a question, note which habit it tests: decompose before you fix, put the security boundary where the side effect happens, and trust an eval only after you check what it covers. The 12 open-ended questions with answer guides are at aijobprep.app/questions/ai-engineer.html.
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