{
    "action": "tool_call",
    "reasoning": "I need to find the total number of rows and columns across all tables in the dataset. I will query the analytics.table_overview metadata table to get these aggregates.",
    "tool": "query_sql",
    "args": {
        "purpose": "Get total rows and columns",
        "source": "raw",
        "sql": "SELECT SUM(row_count) as total_rows, SUM(column_count) as total_columns, COUNT(*) as total_tables FROM analytics.table_overview;"
    }
}