Question 130
CCA-F is a newly released exam. These practice questions reflect our best current understanding — the exact wording and question formats may change in the live exam until the certification matures. Use them to learn the concepts, not to memorize.
Scenario: Customer Support Agent - Three tools return dates differently: `lookup_order` gives a Unix timestamp, `get_shipment` returns "Mar 5, 2025", and `get_invoice` returns ISO 8601. The agent frequently miscompares dates across them when computing return eligibility. Which mechanism best normalizes the data before the model sees it?
- AA system-prompt instruction telling the model to mentally convert every date to ISO 8601 before comparing.
- BA `tool_choice` setting that forces the model to call only one date-returning tool.
- CA `PostToolUse` hook that converts every tool result's date fields into one canonical format (ISO 8601).
- DAsking each MCP server's vendor to change their output format.