An agent team is deciding where to use Agent SDK hooks instead of prompt instructions. Which two requirements are best implemented with hooks? Select two.

Answer: B and D — Refunds above $500 must never execute without human approval / All dates from MCP tools must reach the agent in ISO 8601 format

Hooks give deterministic guarantees: call interception for a refund limit that must never be exceeded (b), and PostToolUse normalization so every tool result arrives in a consistent date format (d). Empathy (a) and answer length (c) are judgment-based style preferences where prompt guidance is appropriate.