{
    "action": "tool_call",
    "reasoning": "Get semantic roles, null counts and cardinality of columns from the metadata view, using January and May as representatives since the schemas are identical.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT table_name, column_name, phys_type, semantic_role, rough_kind, null_count, distinct_count, key_role, aggregation_role FROM analytics.column_overview WHERE table_name LIKE '%January 2022' OR table_name LIKE '%May 2022' ORDER BY table_name, column_name",
        "purpose": "Get semantic roles and cardinality of columns to classify them (January and May representative; schemas identical)",
        "source": "raw"
    }
}