{
    "action": "tool_call",
    "reasoning": "I need to see the actual values in the 'Day' and '_ingestion_timestamp' columns to determine the time period covered, since previous queries returned strange min/max values for 'Day' (like 'Voicemail' and 'Tue').",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT Day, _ingestion_timestamp FROM raw.callyeah_analytics_2026_07_23 LIMIT 10",
        "purpose": "Check sample values for time columns to understand the time period.",
        "source": "raw"
    }
}