The server has 1 tool explicitly defined (cari_produk), which is visible in the code with minimal schema. The tool has a basic description and structured input schema, but significant gaps exist: parameter descriptions are completely absent (the 'keyword' parameter has no documentation), output schema is not documented, error handling is minimal, and tool naming/composition patterns are not fully followed. The schema shows type information (object with string property), meeting the baseline of having visible types, but lacks the depth needed for production LLM interactions. The tool lacks actionable error messages and recovery guidance. Per the rubric baseline, 100% of A+ tool parameters have descriptions; this tool has 0%. The code sample also mentions 'tool beli_barang' in comments but provides no actual implementation, tools must be directly visible and complete in source to be scored above 50.

• Add a detailed description for the 'keyword' parameter: e.g., 'Search term to find products by name. Supports partial name matching (case-insensitive). Minimum 1 character, maximum 100 characters. Returns all products whose names contain the keyword.'
• Document the output schema explicitly in the tool definition: 'Returns an array of product objects with fields: id (string), nama (string), harga (number), stok (number), kategori (string). Empty array if no matches found.'
• Enhance the main tool description to 50 - 200 characters with actionable context: 'Search for products in the electronics store inventory by partial name match. Use this to find products before checking stock, price, or creating purchase orders. Supports case-insensitive search.'
• Implement input validation: reject keyword strings with length < 1 or > 100; return a clear error message: 'Keyword must be 1-100 characters. Got: <actual length>.'
• Add error handling: if the search returns 0 results, respond with 'No products found matching "<keyword>". Try a shorter search term or check the spelling.' If products.json is missing/malformed, return 'Unable to load product database. Retry later or contact support.'
• Complete the 'beli_barang' tool implementation in the source code or remove the placeholder comment. All tools must be fully visible and functional in the code.
• Add tool annotations (readOnlyHint, idempotentHint) to mark cari_produk as read-only and idempotent, helping LLMs optimize call ordering.