Single tool 'run_scan' has a clear action verb and basic schema, but lacks depth in descriptions and parameter documentation. Tool description is 89 chars (below the 194-char baseline for A+ tools). Parameters lack detailed constraints, format specifications, and usage guidance. No output schema is documented. Error handling is not visible in the provided code. The tool appears functional but falls short of production-grade quality standards.

• Expand tool description to 150 - 250 chars. Include: what the tool does (runs a Sift scan), when to use it (when you need to filter securities by expression), what it returns (matching securities and scan metadata), and any prerequisites (valid API key, properly formatted expression).
• Add detailed parameter descriptions: 'source' should explain valid operators (e.g., 'close', 'ema()', 'delivery_pct'), syntax rules, and link to expression documentation. 'universe' should specify valid range (e.g., 1 - 10000) and what it controls (number of securities to scan).
• Document the output schema explicitly. Specify what fields are returned (e.g., matching_securities array with fields like symbol, price, scan_score), total count, and any pagination info.
• Add error handling guidance: 'If the expression is invalid, the error will include the syntax error location. If the API key is missing or invalid, you will receive a 401 Unauthorized error, check your PATTERNSRADAR_API_KEY environment variable.'
• Consider adding a 'limit' parameter to cap results and enable pagination, following the paginated-result pattern. This prevents context window exhaustion if a scan matches thousands of securities.