This is a test server for the mcp-evals CLI tool, not a production MCP server. All 6 tools have clear verb-prefixed names (add, echo, get_*) and valid JSON schemas with typed parameters. Descriptions are present but terse (8-56 chars), falling short of the 50-200 char guidance for LLM-optimized descriptions. All tools are READ_ONLY and low-risk. Schemas are well-formed with proper type definitions and parameter descriptions. However, no output schemas are documented, no error handling guidance exists, and descriptions lack context about WHEN to use each tool or what dependencies exist between them. This is acceptable for a reference test server but would not meet production standards.

• Add return type documentation for each tool. E.g., add returns {result: number, calculation_time_ms: integer}. get_user returns {user_id: string, name: string, email: string}. This enables LLMs to plan chained calls.
• Expand descriptions to 50-200 chars with context: 'Returns the sum of two numbers. Use this to perform simple arithmetic calculations.' for add; 'Retrieves system logs from the named service (e.g., api, worker, database) within optional time range. Useful for debugging service issues.' for get_system_logs.
• Add error guidance: 'If the environment variable is not set, this tool returns empty value. Consider checking documentation for available variables.' or 'User not found. Try with a different user_id or call search_users() first.'
• Convert get_system_logs 'level' parameter to enum: {"type": "string", "enum": ["info", "warn", "error", "all"], "description": "..."}
• Add bounds to 'lines' parameter: {"type": "integer", "minimum": 1, "maximum": 1000, "default": 10, "description": "Number of recent log lines (1-1000, default 10)"}
• Document any side effects or state changes (none here, but pattern is important for real tools): clarify all tools are read-only with no mutations.
• Add dependency hints for tools that might be called in sequence, e.g., 'get_user requires a valid user_id string. If you have a username, search for the user first.'