5 tools with clear naming (verb_noun pattern), good descriptions (110-188 chars average), and complete Zod schemas with proper type constraints. Descriptions are contextual and explain what the tool does, when to use it. All parameters have types and descriptions. Output schemas are documented (returned as JSON text). Error handling is basic but present (e.g., 'No product found' message in get_product_by_amm). Main gaps: no error recovery guidance, no explicit enumeration constraints where applicable, no tool annotations (readOnlyHint), and responses are JSON-serialized text rather than structured content blocks. Tools are well-composed with clear chaining: search_products/get_product_by_amm → get_product_details/get_product_usages. All tools are read-only (safe to retry). No security issues detected (no secrets in params, no dangerous defaults). Naming is clear and consistent (verb_noun, domain-specific). Parameter defaults (page=1) are sensible.

• Return structured content blocks with typed fields instead of JSON strings. Refactor tool responses to return { type: 'object', properties: { products: [...], total: 123, hasMore: true } } rather than wrapping everything in a JSON.stringify() text block. This aligns with pattern:response-shaper and reduces token overhead.
• Add readOnlyHint annotations to all tool schemas in the McpServer registration. Mark each tool with { readOnly: true } to explicitly declare idempotence and retry safety.
• Enhance error recovery guidance. Modify get_product_by_amm to return: 'Product with AMM number "2160001" not found. Try search_products() with product name or active substance name to locate it.' Similarly for other lookup failures.
• Add string length and character constraints to search parameters. Describe search as 'Product name, active substance name, or AMM number (max 100 chars, alphanumeric + spaces/hyphens only)' to guide LLM input and enable server-side validation.
• Document the relationship between search_products/get_product_by_amm and get_product_details/get_product_usages explicitly. Add to descriptions: 'First call search_products() or get_product_by_amm() to obtain the product ID, then pass it to this tool.' This guides tool composition.
• Add rate limiting context to pagination. Specify in descriptions: 'Results are paginated (default 20 per page). Use page parameter to iterate. Recommended: request no more than 5 pages per search to avoid rate limits.' This prevents agent runaway loops.