CCARF Practice Question

Paper 4 · Question 2

D2 Tool Design & MCP Integration · Paper 4

A synthesis agent frequently returns control to the coordinator for simple fact verification, adding 2–3 round trips per task and 40% latency. Analysis shows 85% of verifications are simple lookups. What is the most effective solution?

• A.Increase the coordinator's parallelism so it can process the queued verification requests faster and absorb the extra round trips.
• B.Give the synthesis agent a scoped verify_fact tool for simple lookups, escalating only complex checks to the coordinator.
• C.Remove fact verification from the synthesis workflow altogether, which eliminates both the round trips and the latency they add.
• D.Add a coordinator-level cache of verification results so repeated lookups return instantly, removing most of the round-trip latency.

Show answer & explanations

Correct answer: B

A: Faster processing does not eliminate unnecessary round trips. The latency comes from the routing overhead itself, not the coordinator's speed.

B: A scoped cross-role tool handles the 85% simple case directly, eliminating round-trip latency. Complex cases still route through the coordinator for proper handling.

C: Removing verification compromises output quality. The goal is to make verification faster, not to skip it.

D: Caching helps with repeated lookups but does not address the fundamental round-trip overhead for first-time verifications, which are the majority.

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