I have the row and column counts from the evidence. Now I need to determine the time period coverage by examining temporal columns across the tables. ```json { "action": "tool_call", "reasoning": "I have row/column counts for all tables. Now I need to find temporal coverage. I'll query for min/max dates across key timestamp columns in the main tables to determine the dataset's time span.", "tool": "query_sql", "args": { "sql": "SELECT 'batches' as table_name, MIN(started_at) as earliest, MAX(completed_at) as latest FROM raw.batches UNION ALL SELECT 'jobs', MIN(created_at), MAX(updated_at) FROM raw.jobs UNION ALL SELECT 'llm_calls', MIN(created_at), MAX(created_at) FROM raw.llm_calls UNION ALL SELECT 'analysis_runs', MIN(created_at), MAX(created_at) FROM raw.analysis_runs UNION ALL SELECT 'datasets', MIN(created_at), MAX(updated_at) FROM raw.datasets ORDER BY earliest", "purpose": "Find the overall time period covered by the dataset by checking min/max timestamps across key tables" } } ```