This server has critical definition gaps. Tool names lack action verbs (e.g., 'create-cart' uses hyphen instead of underscore; 'view-cart' is vague). Descriptions are present but minimal (10-30 chars), well below the 50-200 char baseline for LLM optimization. Input schemas are visible and typed, but parameter descriptions are sparse or missing entirely. No output schemas documented. Error handling is absent. The server appears to be a proof-of-concept rather than production-grade.

• Rename all tools to use underscores and action verbs: 'create_shopping_cart', 'add_item_to_cart', 'list_cart_items', 'proceed_to_checkout', 'search_products', 'get_product_details'.
• Expand descriptions to 80-150 chars. Example: 'Create a new Amazon shopping cart and add an item by ASIN. Returns cart_id for future operations. Use this to start a new shopping session.'
• Document output schemas for each tool. Example for create_shopping_cart: {cart_id: string, items: [{asin, quantity, price}], total: number, expires_at: ISO8601}.
• Add parameter descriptions for all enum values. For sortBy, explain: 'relevancerank = most relevant first, salesrank = best sellers first, price-asc-rank = lowest price first'.
• Add error handling guidance: 'If checkout fails with 'payment_declined', ask the user to verify payment method. If 'cart_empty', call add_item_to_cart first. If 'session_expired', create a new cart.'