Tools & Descriptions — CCDV-F Practice Question
A representative Claude Certified Developer - Foundations (CCDV-F) exam question on Tools & Descriptions. Work through it below, then read why each option is right or wrong.
Short answer
The correct answer is A. Make both tool names, descriptions, parameters, and use boundaries precise and non-overlapping.
Tool descriptions and schemas are part of the model's selection interface. Clear, mutually distinct contracts directly address systematic misselection.
The Question
Claude repeatedly chooses `search_customers` when it should use `get_customer_by_id`. What is the best first improvement?
Why A is correct
Tool descriptions and schemas are part of the model's selection interface. Clear, mutually distinct contracts directly address systematic misselection.
Why the other options are wrong
Option B does not satisfy the requirement in the scenario. Review the explanation above: the correct choice (A) is the only one that fully meets every constraint stated in the question.
Option C does not satisfy the requirement in the scenario. Review the explanation above: the correct choice (A) is the only one that fully meets every constraint stated in the question.
Option D does not satisfy the requirement in the scenario. Review the explanation above: the correct choice (A) is the only one that fully meets every constraint stated in the question.
Key idea: Tools & Descriptions
Tool descriptions and schemas are part of the model's selection interface. Clear, mutually distinct contracts directly address systematic misselection. On the CCDV-F exam, questions in the "Tools and MCPs" domain test whether you can map a scenario's constraints to the right choice. Read the requirement carefully, eliminate options that violate any single constraint, and pick the one that satisfies all of them with the least operational overhead.
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