Single-tool server with moderately well-defined schema and descriptions. Tool naming is clear and verb-based ('fetch_url'), parameter descriptions are present with reasonable detail, and input schema uses Zod for validation with types. However, output schema is not documented, error handling lacks recovery guidance for LLMs, and composition patterns are not leveraged. The tool description (67 chars) meets baseline but could be more prescriptive about when/why to use it. Parameters are properly typed but lack usage examples and edge-case guidance.

• Document the output schema explicitly in the tool definition, e.g.: 'Returns {content: [{type: "text", text: string}], isError?: boolean}. Use the 'text' field to extract markdown content.'
• Enhance error handling with actionable recovery guidance. Example: 'Error: URL validation failed. Pass a valid http:// or https:// URL.' or 'Timeout waiting for selector '.main-content' after 5000ms. Try increasing timeout or verify the selector exists on the page.'
• Add min/max constraints to numeric parameters. E.g., timeout: 'Timeout in milliseconds, 1000 - 120000 (default: 30000). Timeouts longer than 120 seconds may be rejected.'
• Add format constraints to string parameters. E.g., waitForSelector: 'Valid CSS selector, e.g. ".article-body", "#main", "div[data-content]". Invalid selectors will cause the fetch to fail.'
• Either remove the unused resource template or fully implement it with a meaningful list() that returns available fetch URIs. If removed, simplify the server to a pure tool-only interface.
• Improve the tool description from 67 to ~120 characters to include when/why to use it: 'Fetch and convert web page content to markdown. Use when you need to extract and summarize web pages. Supports JavaScript rendering via Puppeteer and custom wait selectors. Returns markdown text of page body and title.'
• Add tool annotations: mark fetch_url as readOnlyHint: true since it does not modify external state, just reads and transforms.