{
    "action": "tool_call",
    "reasoning": "To understand what a single row represents, I need to look at the actual columns and sample data of the main tables. I'll start by examining a 'plays' table.",
    "tool": "query_sql",
    "args": {
        "purpose": "Sample rows from a plays table to understand granularity",
        "source": "raw",
        "sql": "SELECT * FROM raw.2023_plays LIMIT 3;"
    }
}