{
    "action": "tool_call",
    "reasoning": "I need to retrieve the remaining 11 columns (since the previous queries were truncated at 50 rows) to provide a complete list of all 61 columns, their data types, and their semantic roles.",
    "tool": "query_sql",
    "args": {
        "purpose": "Get the remaining 11 columns from the dataset",
        "source": "raw",
        "sql": "SELECT column_name, phys_type, semantic_role FROM analytics.column_overview ORDER BY column_name OFFSET 50"
    }
}