This MCP server has 4 tools with basic definitions but significant quality gaps. Tool names are action-oriented (echo, hello_tool, raise_error, list_demo_capabilities) but descriptions are minimal and lack depth. Input schemas are present but sparse, most parameters lack detailed descriptions. Output schemas are entirely undocumented. Error handling is absent (raise_error tool deliberately throws an exception with no recovery guidance). No tool demonstrates the LLM-optimized description length baseline of 50-200 characters. No parameters have constraints (enums, ranges, patterns). The server reads as a template/demo rather than production-grade. Average tool score: 42/100.

• Expand each tool description to 50 - 200 characters, following pattern:tool-description. Example for echo: 'Echoes text back to the caller. Use for testing connectivity or to verify input parsing. Useful in agent chains to pass data between steps without modification.'
• Document all output schemas explicitly in tool docstrings or schema definitions. Specify field names, types, and examples. E.g. for echo: returns {"text": string, "length": int, "timestamp": ISO8601}.
• Add detailed parameter descriptions (≥20 chars each) with format/constraint hints. E.g. 'name (string, 1 - 100 chars, alphanumeric + spaces): Person to greet. Used in greeting message.'
• Add input constraints to parameters: enum values where applicable, min/max length for strings, ranges for numbers. E.g. hello_tool name parameter: add maxLength: 100, pattern: '^[a-zA-Z0-9 ]+$'.
• Replace raise_error with actionable error behavior: catch exceptions, return structured error with code, message, and recovery hint. E.g. {"error": "test_error", "message": "This is a test error.", "recovery": "Retry the operation or contact support."}
• For list_demo_capabilities, document the response structure. E.g. {"capabilities": [{"name": string, "type": string, "description": string}], "total": int}. Add a description explaining what each capability field means.
• Improve naming clarity for list_demo_capabilities: rename to 'list_registered_tools' or 'describe_server_capabilities' to disambiguate what 'capabilities' means.
• Add parameter descriptions to raise_error (even though it has no parameters, its docstring lacks context). State: 'Testing tool for error handling verification. Always raises an exception. Use to verify error recovery flows.'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry