I have the row and column counts from step-0, but I need to determine the time period coverage. Let me check for temporal columns across the dataset. ```json { "action": "tool_call", "reasoning": "I have row/column counts but need to find temporal coverage. The previous queries (steps 1-3) returned no rows, suggesting they may have been looking for specific patterns that don't exist. I'll query the column metadata to find all date/timestamp columns across tables, then check their min/max values to determine the dataset's time period.", "tool": "query_sql", "args": { "sql": "SELECT table_name, column_name, phys_type, min_value, max_value FROM analytics.column_overview WHERE phys_type IN ('TIMESTAMP', 'DATE', 'TIMESTAMP WITH TIME ZONE') AND min_value IS NOT NULL ORDER BY min_value LIMIT 50", "purpose": "Find all temporal columns with actual data to determine the dataset's time period coverage", "source": "raw" } } ```