CCDV-F: Claude Certified Developer — Foundations

Question

Your Claude application uses tool calling to retrieve patient data and generate summary reports. The flow sometimes fails because the model returns a tool_use block that references arguments not present in the schema, and your application code does not handle this case gracefully.

How would you address this?

Explanation

Validating tool inputs before dispatch lets the application reject invalid arguments and handle them as a known error rather than failing unexpectedly. The schema must disallow additional properties if undeclared arguments are to be rejected. Where supported, strict: true can also enforce schema-conforming tool inputs. (platform.claude.com)

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CCDV-F: Claude Certified Developer — Foundations

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