{
    "action": "tool_call",
    "reasoning": "The question asks about natural segmentation opportunities across the dataset. I've already seen deal_stage provides a clear funnel segmentation (Won/Lost/Engaging/Prospecting). Now I should explore other potential grouping dimensions: 1) Product categories/series, 2) Account characteristics (sector, size by revenue/employees, geography), 3) Sales team structure, and 4) Temporal patterns. Let me start by examining the product dimension to see if there are natural product families or tiers.",
    "tool": "inspect_columns",
    "args": {
        "table": "products"
    }
}