{
    "action": "tool_call",
    "reasoning": "The question asks about natural segmentation opportunities. I already have evidence showing class and gender breakdowns with survival rates, which are strong segmentation candidates. To provide a comprehensive answer about natural groupings, I should examine age distribution patterns (children vs adults), family structure (traveling alone vs with family), and fare ranges, which could reveal additional meaningful segments beyond the demographic splits I've already found.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT CASE WHEN Age < 18 THEN 'Child' WHEN Age >= 18 AND Age < 60 THEN 'Adult' WHEN Age >= 60 THEN 'Senior' ELSE 'Unknown' END AS age_group, COUNT(*) AS passengers, ROUND(AVG(Survived) * 100, 1) AS survival_rate, ROUND(AVG(Fare), 2) AS avg_fare FROM raw.titanic GROUP BY age_group ORDER BY CASE age_group WHEN 'Child' THEN 1 WHEN 'Adult' THEN 2 WHEN 'Senior' THEN 3 ELSE 4 END",
        "purpose": "Examine age-based segmentation to see if children, adults, and seniors form distinct groups with different survival patterns",
        "source": "raw"
    }
}