{
    "action": "tool_call",
    "reasoning": "I have no executed result in evidence for the species counts, so I need to run the query before claiming the classes are balanced. The gold table iris_by_species holds row_count per species.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT species, row_count FROM iris_by_species ORDER BY row_count DESC",
        "purpose": "Show the distribution of the species categorical column to see whether any value is most common",
        "source": "gold"
    }
}