{
    "action": "tool_call",
    "reasoning": "Profile each column's type, role, cardinality and uniqueness in one query against the column overview metadata, matching either table name form.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT table_name, column_name, phys_type, semantic_role, rough_kind, null_count, distinct_count, uniqueness_score, min_value, max_value, aggregation_role, key_role FROM analytics.column_overview WHERE table_name IN ('iris', 'raw.iris')",
        "purpose": "Profile each column's type, role, cardinality and uniqueness to classify as identifier, dimension, metric, or temporal",
        "source": "raw"
    }
}