Single tool (pi_calc) with partial but incomplete definitions. The tool has a valid input schema with properly typed parameters and reasonable constraints (min 3, max 1000, default 10), but the description is extremely sparse (62 characters). No output schema is documented or visible. The tool name follows verb_object pattern but the description does not adequately explain WHEN to use this tool, what it returns, or provide the context an LLM needs for tool selection. Parameter description exists but is minimal. No error handling guidance, no composition metadata, no security considerations documented. The server infrastructure appears functional (Express-based HTTP routing with JSON-RPC 2.0 backend) but tool quality falls below production baseline (median ~50 for community servers).

• Expand tool description to 100-200 characters. Example: 'Computes the mathematical constant pi (π) to a specified number of decimal places. Returns the digits as a string. Useful for mathematical calculations, educational purposes, and testing numeric precision. Accepts 3-1000 decimal places.'
• Document output schema explicitly. Define what structure is returned (e.g., { type: 'object', properties: { value: { type: 'string', description: 'Pi digits as a string, e.g. 3.14159265' }, decimals: { type: 'number' } } }).
• Add error handling to the controller (examples/mcp/pi/controller.ts) and document possible errors. Example: 'If decimals < 3 or > 1000, returns error: Invalid decimals parameter. Must be between 3 and 1000.'
• Clarify parameter description for 'decimals': 'The number of decimal places to compute (e.g., 10 returns 10 digits after the decimal point). Must be between 3 and 1000. Larger values increase computation time.'
• Consider adding a 'format' parameter or output option (e.g., 'scientific' vs 'standard') to increase utility for different LLM use cases.