CCARF Practice Question

Paper 1 · Question 11

D1 Agentic Architecture & Orchestration · Paper 1

A customer support agent handles account deletion requests. The company policy requires explicit human approval before any account is permanently deleted. Currently, the agent sometimes processes deletions autonomously when the customer is insistent. What approval mechanism should the architect implement?

• A.Add a system prompt instruction: 'Always get manager approval before processing account deletions'
• B.Implement a PreToolUse hook on the delete_account tool that pauses execution and routes the request to a human approval queue before proceeding
• C.Remove the delete_account tool from the agent entirely and require customers to call a separate phone line
• D.Implement a PostToolUse hook that reviews the deletion after it has been processed and reverts it if no approval was recorded

Show answer & explanations

Correct answer: B

A: Prompt instructions are probabilistic. The question states the agent 'sometimes processes deletions autonomously when the customer is insistent,' showing that prompts alone are insufficient for irreversible operations that require 100% human approval.

B: A PreToolUse hook on the delete_account tool intercepts the call before execution and enforces the human approval requirement deterministically. The deletion cannot proceed until a human explicitly approves it, regardless of how insistent the customer is.

C: This creates a poor customer experience and eliminates the agent's ability to facilitate the process. The correct approach is to keep the tool but gate it behind human approval, providing a seamless escalation flow.

D: PostToolUse hooks run after execution. Account deletion may be irreversible or difficult to undo. Prevention via a PreToolUse hook is required, not post-execution rollback.

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