This MCP server exhibits critical definition quality deficiencies. The single tool 'build_client' has a minimal description (63 characters), lacks comprehensive parameter descriptions, and the code shows no explicit MCP server framework or tool registration mechanism. The source reveals a basic Python class with no evidence of MCP protocol integration. No tool registration, no schema validation, no error handling patterns, and no output schema documentation. The tool appears to be a standalone utility rather than a properly integrated MCP server.

• Add explicit MCP server bootstrap: detect and instantiate an MCP server instance using the Python SDK (mcp package); register tools via server.add_tool() or equivalent
• Expand tool description from 63 to 150-200 chars; add WHEN/WHY context: 'Use when you have an API spec (OpenAPI, plain text, or Swagger) and need a working Python client wrapper. Called before integration coding.'
• Add format constraint to api_spec parameter: 'OpenAPI/Swagger spec or plain-text endpoint list. Include HTTP method, path, headers, and auth details. Example format: POST /v2/user/validate'
• Add range constraint to default_timeout: 'Timeout in seconds (1 - 300). Typical: 15 for HTTP, 60 for long-running tasks. Defaults to 30.'
• Document output schema explicitly: 'Returns a Python code string containing a complete CustomAPIClient class with execute_request() method. The code is ready to save and import.'
• Replace bare Exception handling with specific error types and recovery guidance: validate api_spec against simple structure checks (presence of method + path); return clear errors like 'Invalid API spec: could not find HTTP method (POST/GET/PUT/DELETE) in provided text. Please include: METHOD /path'
• Add input validation before regex parsing: check api_spec is non-empty, timeout is positive integer in range 1 - 300; return errors with constraint violations, not stack traces
• Add tool annotations if MCP server supports them: mark as readOnlyHint=true (generates code, does not modify state), idempotentHint=true (same spec → same code output)