Single tool with minimal definition quality. UrlShortener has a basic description (11 chars: 'Shortens URL') that falls below the 20-char minimum and lacks context on when/why to use it. Input schema is present with proper type (string) and format (uri), but parameter description is generic. No output schema documented. No error handling guidance. Tool lacks idempotency hints, rate-limit warnings, or recovery paths for external service failures. Naming is acceptable (verb_noun pattern) but description quality is critically weak.

• Expand tool description to 50-150 chars. Example: 'Shortens a long URL using the Spoome service. Returns a compact short URL suitable for sharing. Useful when URLs are too long for chat or social media. Idempotent: same input always returns the same short URL.'
• Document the output schema explicitly. Specify that the tool returns a string (the short URL), not an object. Example: '@returns {string} The shortened URL (e.g., https://short.url/abc123)'
• Add error handling guidance in the description. Example: 'If the URL is invalid or the service is unavailable, the tool will return an error. Ensure the URL is properly formatted (http:// or https://) and publicly accessible.'
• Enhance parameter description with format constraints. Example: 'The original long URL (must start with http:// or https://, max 2048 chars, must be publicly accessible)'
• Add rate-limit and idempotency notes. Example: 'This tool is idempotent, calling it multiple times with the same URL returns the same short URL. Rate limit: 100 requests per minute per API key.'