Single tool 'parse_test_output' has a clear, action-oriented name and adequate description (127 chars, within 10-1024 range). Input schema is present with proper type and description for the 'test_output' parameter. However, the output schema is completely undocumented, the Report struct with Passed, Failed, and Failures fields is defined in code but never exposed in the tool's InputSchema/output contract. LLMs cannot plan downstream operations without knowing what fields to expect. No error handling guidance, no parameter constraints (e.g., max input size), and no documentation of supported formats beyond the description. The tool is read-only (good), but lacks the structured output documentation and error recovery patterns expected of production tools.

• Document the complete output schema in the tool definition: 'Returns a Report object with fields: passed (int), failed (int), failures (array of Failure objects). Each Failure contains: test (string), package (string), output (string), location (string).'
• Add input constraints to the parameter description: 'test_output: The raw Go test output (max 10MB). Supports both 'go test -json' (one JSON object per line) and 'go test -v' (verbose text format). Auto-detects format.'
• Include error recovery guidance: 'If parsing fails, verify the output format matches 'go test -json' or 'go test -v'. For malformed JSON, check that each line is a complete JSON object.'
• Specify result limits: 'Returns up to 1000 failures. If more failures exist, truncates and sets a flag indicating overflow. Call with smaller test suites or filter by package to see all failures.'
• Add examples to the description showing expected input and output structure, or link to Go test documentation for format details.