Single tool with minimal schema documentation. Tool name 'execute_query' lacks action clarity (execute is vague). Input schema present but parameter descriptions are missing entirely, 'params' has no description of what parameters the Redash query accepts. Output schema undocumented; response structure inferred from code only. Tool description is generic (10 words, 45 chars) and does not explain when to use it, what it returns, or prerequisites. No error guidance for LLM recovery. Baseline: A+ tools average 194 chars description + 100% param descriptions; this tool has neither.

• Add detailed parameter descriptions: 'query_id (integer): The numeric ID of the Redash query to execute. Obtain from Redash UI or via list_queries tool.' and 'params (object): Optional key-value pairs for parameterized queries. Keys must match query parameter names defined in Redash.'
• Expand tool description to 150-200 chars: 'Execute a Redash query by ID and retrieve results. Use this to run saved queries with optional parameters. Returns structured data rows. Requires REDASH_URL and REDASH_API_KEY environment variables.'
• Document output schema in description or as a separate field: 'Returns object with keys: rows (array of objects), columns (array of column metadata), query_hash (string).'
• Add error recovery guidance: On timeout, suggest 'Query took too long. Try with a smaller date range or fewer rows.' On 'Query execution failed', suggest 'Check query_id is valid and parameters match query definition.'
• Consider renaming to 'run_query' or 'get_query_results' for clearer action semantics, and add optional 'timeout_seconds' parameter (default 30) to let agents control wait time.