{
    "action": "tool_call",
    "reasoning": "The card mentions products have a 'series' classifier (~3 distinct values) which could be another natural segmentation dimension. I should examine this to complete the picture of available segmentation approaches.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT series, COUNT(*) as product_count, STRING_AGG(product, ', ') as products FROM raw.products GROUP BY series ORDER BY product_count DESC",
        "purpose": "Understand product series as a potential segmentation dimension",
        "source": "raw"
    }
}