Server provides 7 tools with basic descriptions and READ_ONLY/WRITE risk labels. However, critical gaps prevent higher scoring: (1) No visible input schemas in provided source, cannot verify parameter types, constraints, or descriptions; (2) Tool descriptions are present but minimal (10-50 chars), lacking WHEN/WHY context and LLM-optimization guidance; (3) No documented output schemas; (4) Error handling delegates to upstream VkusVill API without recovery guidance; (5) No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Tools are well-named (verb_noun pattern: search_products, get_product_details, create_cart_link) and single-responsibility, but lack the depth required for confident LLM selection and parameter binding.

• Add explicit JSON Schema input definitions to each tool with types, constraints, and per-parameter descriptions (50-100 chars each). Example: search_products should declare query (string, required), category (enum), limit (integer, 1-100, default 20).
• Expand tool descriptions to 80-150 chars following pattern: '[WHAT] [WHEN to use] [KEY PARAMS]'. E.g. 'Search VkusVill product catalog by name or category. Use before get_product_details to find product IDs. Returns product name, ID, price, availability.'
• Document output schemas for each tool. Specify returned fields, types, and pagination structure. For list tools, include limit, offset, total_count, and next_cursor if applicable.
• Enhance error handling with recovery guidance. Categorize errors (retryable, user-fixable, fatal) and suggest next steps. E.g. 'Product not found. Try search_products() with a partial name or different category.'
• Add tool annotations to tool definitions: readOnlyHint=true for all GET tools, destructiveHint=true for create_cart_link (if it modifies state), idempotentHint=true for read-only tools.