The server defines 9 tools with clear action verbs (product_search, calculate_co2_impact, add_to_cart, etc.) and mostly complete input schemas. However, critical gaps exist: output schemas are completely undocumented, parameter descriptions lack depth (many are single phrases rather than actionable guidance), and error handling patterns are absent. The tool definitions follow basic naming conventions but lack the LLM-optimized descriptions needed for reliable agent selection. Most tools fall in the 55 - 70 range; the architecture is present but execution quality is inconsistent.

• Document the output schema for every tool. E.g., product_search should declare: returns an array of {product_id, name, price, eco_rating, description, in_stock}. This enables downstream tool chaining.
• Convert free-form string parameters to enums where valid values are known. E.g., manufacturing_location should be an enum: ['global', 'asia', 'europe', 'north_america']. This prevents hallucinated values.
• Expand parameter descriptions to include constraints, examples, and context. E.g., 'max_price_increase_percent in get_eco_alternatives: Maximum acceptable price increase as a percentage (0-100). E.g., 20 means accept alternatives up to 20% more expensive. Use 0 for same price or cheaper.'
• Add pagination to product_search and compare_products. Introduce 'offset' and 'total_count' to the response schema, and document: 'Returns up to 50 results per call. Use offset to retrieve additional batches.'
• Document error scenarios and recovery paths for write operations. E.g., checkout should document: 'Returns error if cart is empty (suggest add_to_cart), if payment fails (ask user to verify card), or if items are out of stock (suggest get_eco_alternatives).'
• Add tool annotations (readOnlyHint, destructiveHint) to tool definitions per the current MCP spec. This makes operation risk visible to clients without requiring external documentation.
• For checkout, document the expected shape of shipping_address (required fields: street, city, state, postal_code, country) and validate it server-side with clear error messages.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry