{
    "action": "tool_call",
    "reasoning": "I need to find the exact number of rows and the time period covered by the dataset. I will query the raw table to get the row count and the minimum and maximum values of the _ingestion_timestamp column.",
    "tool": "query_sql",
    "args": {
        "purpose": "Find row count and time period covered by the dataset",
        "source": "raw",
        "sql": "SELECT COUNT(*) as total_rows, MIN(_ingestion_timestamp) as min_time, MAX(_ingestion_timestamp) as max_time FROM raw.AI_Usage_and_Impact_on_Students_and_Professionals"
    }
}