Single tool 'execute_skill_action' has a minimal description (95 chars) that lacks actionable context for LLM selection. Input schema is present but extremely sparse: only one parameter 'query_payload' (string type, minimal description). No output schema is documented, the tool returns a hardcoded JSON response with 'status' and 'message' fields, but this structure is not declared in the tool definition. No error handling guidance, no parameter constraints, no indication of what 'query_payload' format is expected. The tool name 'execute_skill_action' is generic and does not follow verb_noun convention clearly (what action? what skill?). No evidence of idempotency, pagination, or composition with other tools. The implementation is a stub that always returns success, making it unsuitable for production use.

• Rename tool to a specific verb_noun pattern: 'track_product_price' or 'search_price_drops' to clarify intent and match the shopping graph use case.
• Expand tool description to 100-200 chars explaining: (1) What it does (tracks real-time price drops for products), (2) When to use it (when user asks about product prices or deals), (3) What it returns (price tracking ID, current price, merchant, deal rating). Example: 'Track real-time price drops for products by GTIN or name. Returns current lowest price, merchant, historic average, and deal rating. Use when user asks about product prices or deals.'
• Document the output schema explicitly in the tool definition. Include fields: radar_tracking_id (string), product_name (string), current_lowest_merchant_price_usd (number), lowest_merchant_name (string), historic_30d_avg_price_usd (number), price_drop_amount_usd (number), deal_rating_score (enum: EXCEPTIONAL_ALL_TIME_LOW|GREAT_DEAL|GOOD_DEAL|FAIR_PRICE|ABOVE_AVERAGE), price_history_graph_url (string).
• Replace 'query_payload' parameter with explicit, typed parameters: product_gtin (string, 12-14 digits), product_name (string, optional), price_threshold_usd (number, optional, min 0). Add descriptions: 'Global Trade Item Number (barcode) for the product, 12-14 digits' and 'Optional price threshold in USD; returns deals below this price.'
• Add error handling: document that the tool may fail if GTIN is invalid, product not found, or price service is unavailable. Return actionable errors like 'Product GTIN 0123456789012 not found in shopping graph. Try searching by product name instead.' and 'Price service temporarily unavailable. Retry in 30 seconds.'