{
    "action": "tool_call",
    "reasoning": "Retrieve the date ranges, types and null counts for the temporal columns from the column metadata.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT table_name, column_name, phys_type, min_value, max_value, null_count FROM analytics.column_overview WHERE column_name IN ('Date','year','playing_years') ORDER BY table_name",
        "purpose": "Get date ranges and types for temporal columns",
        "source": "raw"
    }
}