{
    "action": "tool_call",
    "reasoning": "No question was stated beyond the system context, so I'll start by grounding orientation in the profiled column metadata (types, cardinality, nulls, ranges) for the single table.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT column_name, phys_type, semantic_role, rough_kind, distinct_count, null_count, min_value, max_value, key_role FROM analytics.column_overview WHERE table_name = 'Social_media_impact_on_life'",
        "purpose": "Ground column classification in profiled metadata (type, role, cardinality)",
        "source": "raw"
    }
}