CheapShark MCP has basic tool definitions with schemas present, but suffers from critical gaps in parameter descriptions and output documentation. All 5 tools have names and input schemas, but most parameters lack descriptions (e.g., 'deals' tool has 16 parameters with only 2 descriptions). Tool descriptions are minimal (10-30 chars), below the 50-200 char baseline for LLM optimization. No output schemas documented. Error handling is generic (HTTP status codes only). The server is a simple API wrapper without production-grade agent patterns.

• Add descriptions to all 14 undescribed parameters in 'deals' tool. Example: 'pageNumber: Page index (0-based). Use with pageSize for pagination.' 'metacritic: Minimum Metacritic score (0-100). Filters to games with this score or higher.'
• Expand all tool descriptions to 50-150 characters. Example: 'deals' → 'Search PC game deals across Steam, Epic, GOG, Humble. Filter by price, store, rating, release date. Returns paginated results with deal details and store links.'
• Document output schemas for each tool. Example: 'deals returns {deals: [{id, title, storeID, price, savings, metacritic, steamRating}], totalResults: number}'. Include pagination info.
• Convert 'sortBy' parameter from description-based enum to JSON Schema enum: {type: 'string', enum: ['DealRating', 'Title', 'Savings', 'Price', 'Metacritic', 'Reviews', 'Release', 'Store', 'Recent']}.
• Add error recovery guidance. Example: If storeID is invalid, return 'Invalid store ID. Call stores() to list valid IDs.' If no results, return 'No deals found. Try broadening filters (price range, removing store filters).' instead of generic HTTP errors.