Three well-defined tools with complete input schemas, clear descriptions, and proper parameter typing. Tool names follow verb_noun convention (search, get, locator). Descriptions are detailed (150-250 chars) and include examples. All parameters have type and description. However, output schemas are not documented, LLMs cannot see what fields to expect from responses. No error handling guidance for common failures (rate limits, auth, invalid ZIP). Parameters expose _apiKey as a string, violating secret-injection pattern (should use server-side injection). Missing pagination guidance for product_search results.

• Document output schemas for all three tools. Specify fields returned (e.g., store_locator returns: locationId, chain, name, phone, address, geolocation; product_search returns: product_id, name, price, promo_price, stock_level, aisle, images). This enables tool chaining and LLM planning.
• Remove _apiKey parameter from tool definitions. Move credential handling entirely to server-side injection via environment variables. Document in the server README that PLATFORM_KROGER_KEY is injected by the gateway; users with personal quotas should configure their own credentials server-side.
• Add error recovery guidance to tool descriptions. E.g., 'If rate-limited (429), pass your own Kroger API credentials via server configuration. If auth fails (401/403), verify credentials and retry once.'
• Add pagination to kroger_product_search: include 'page' (default 1) and 'limit' (1-50, default 10) parameters. Document that results are capped at 50 per page. Return a 'total_count' and 'has_more' flag in the response.
• Replace example values in descriptions with formal constraints. E.g., 'zip_code: US ZIP code (5 digits, e.g. 45202)' → 'zip_code: US ZIP code (5 digits, pattern: ^\d{5}$)'. Use enums for chain filter: ['Kroger', 'Ralphs', 'Fred Meyer', 'King Soopers', 'Fry\'s', 'Harris Teeter', 'QFC', 'Smith\'s', 'Dillons', 'Food 4 Less', 'Mariano\'s'].