Four tools with clear verb-noun naming (check_, search_, get_, get_) and reasonable descriptions (80-120 chars). All tools have input schemas with type definitions and parameter descriptions. However, output schemas are not documented, responses are formatted as text only, with no structured field definitions. Parameter descriptions lack constraint details (ranges, formats, examples of valid input). Error handling is absent, no guidance on what to do if API calls fail or return unexpected results. Missing tool annotations (readOnlyHint, idempotentHint) despite all tools being read-only operations.

• Document output schemas for each tool. Define structured response objects with typed fields (e.g., check_domains returns array of {domain: string, available: boolean, price?: number}). This enables LLMs to extract and chain data without text parsing.
• Add constraint details to parameter descriptions. For 'domains': 'Comma-separated list of full domain names (max 10 per request, e.g., example.com,test.io)'. For 'action': 'REGISTER for new domains, RENEW for existing, TRANSFER for moving from another registrar.'
• Implement error handling with actionable recovery messages. Catch API failures and return: 'Namecheap API unavailable. Retry in 30 seconds, or try a different TLD.' Include rate limit guidance if applicable.
• Add tool annotations to all tools. Use readOnlyHint: true for all four tools to signal they are safe to call without user confirmation.
• Add result limits and pagination. Document: 'Returns up to 50 results. Use offset/limit parameters for larger searches.' Implement pagination if result sets exceed 50 items.