{
    "action": "tool_call",
    "reasoning": "I need to understand the full dataset structure to identify natural segmentation opportunities. The sample shows daily summaries with days of the week, but I should examine all distinct Day values and check if the unnamed columns contain any segmentation dimensions. I'll query to see the complete set of Day values and check what's in the unnamed columns.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT DISTINCT Day, COUNT(*) as record_count FROM raw.callyeah_analytics_2026_07_23 GROUP BY Day ORDER BY record_count DESC",
        "purpose": "Identify all distinct Day values and their frequencies to understand the temporal structure and potential segmentation",
        "source": "raw"
    }
}