CCA-F Question 41

Question

Your MCP server implements a check_availability tool that queries an external calendar API. During testing, you encounter three error conditions: (1) the tool is called with a malformed request missing the required user_email parameter, (2) the calendar API returns a 404 because the specified user doesn’t exist in the calendar system, and (3) the calendar API returns a 503 because the service is temporarily unavailable. How should each error be reported according to MCP’s error handling design?
A. Report all three as tool results with isError: true.
B. Report errors 1 and 2 as JSON-RPC protocol errors; report error 3 as a tool result with isError: true.
C. Report error 1 as a JSON-RPC protocol error; report errors 2 and 3 as tool results with isError: true.
D. Report all three as JSON-RPC protocol errors.

Accepted Answer

Marked answer: C. Report error 1 as a JSON-RPC protocol error; report errors 2 and 3 as tool results with isError: true.

CCA-F Question 41

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CCA-F Question 41

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