Server provides three well-defined design search tools with complete JSON Schema validation, good descriptions, and proper input constraints. All tools have explicit schema registration via Zod with type safety. Descriptions are action-oriented and include usage guidance. However, output schemas lack formal documentation in comments, and error messages could provide more recovery guidance. Tool composition is clean (each does one thing), and naming follows verb_noun conventions clearly. No critical security issues detected (read-only operations, no secret injection needed).

• Add TypeScript/JSDoc comments above tool handler functions documenting the return structure, e.g.: '/** @returns {{ content: [{ type: string, text: string }], structuredContent: { query: string, count: number, images: Array<{ title, imageUrl, source, link, width?, height? }> } }}'
• Enhance error handling in serperRequest to differentiate timeout (retryable) from 401 (non-retryable). Return structured error with error_code and recovery_hint: { error: 'RATE_LIMIT', hint: 'Wait 60 seconds before retrying.' }
• Clarify 'sites' filtering behavior in parameter descriptions: 'If empty, searches all sites (union). If specified, searches ONLY these sites (intersection).'
• Document 'general' enum value for design_search_styles.type: 'Return combined results across all style categories (default). Equivalent to running all four specific searches and merging results.'
• Add bounds documentation to response count limits. E.g., 'Returns up to N results; actual count may be lower if fewer designs match the query.'
• Consider adding a 'minLength' constraint to 'style' parameter in design_search_styles (currently missing; 'query' has minLength:2). Consistency across similar string params.