This tutorial server has significant definition quality gaps. Tool names lack action verbs (echo, random-duck, sampling, list-root-dir are weak). Descriptions are minimal (10-30 chars, well below the 194-char baseline for A+ tools). Schemas are present but parameters lack descriptions in the high-level server. Duplicate tool registrations (echo and random-duck appear twice) indicate incomplete implementation. No error handling guidance, no output schema documentation, and no parameter constraints beyond basic types. The sampling tool exposes deprecated MCP Sampling pattern. Overall structure is tutorial-grade, not production-ready.

• Rename tools with action verbs: 'echo' → 'echo_message', 'random-duck' → 'fetch_random_duck_image', 'sampling' → 'generate_sample_response', 'list-root-dir' → 'list_root_directory'.
• Expand descriptions to 50-200 chars with WHAT/WHEN/WHY: 'Fetch a random duck image in JPG or GIF format. Use this to add visual variety to responses. Returns base64-encoded image data.'
• Remove duplicate tool registrations. Choose either high-level (McpServer) or low-level (Server) API, not both.
• Document output schemas for each tool. E.g., 'Returns {content: [{type: "text"|"image", text?: string, data?: string, mimeType?: string}]}'.
• Replace deprecated Sampling pattern with direct LLM API calls or remove if not essential to tutorial scope.

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

• Relies on Sampling (deprecated) - integrate directly with the LLM provider API