{
    "action": "tool_call",
    "reasoning": "I have extensive survival analysis already showing expected patterns (women/children first, class matters, family size effects). To find the MOST surprising finding, I need to look for anomalies that contradict these patterns. The most striking anomaly I see in the evidence is in step-8: family size 3 has 72.4% survival rate (the highest of any group), while family sizes 4+ drop dramatically. This is counterintuitive - why would families of exactly 4 people (3 relatives) do so well, but adding one more person causes survival to collapse? Let me verify this pattern holds across different passenger classes to confirm this is genuinely anomalous.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT SibSp + Parch AS family_size, Pclass, COUNT(*) as passengers, SUM(Survived) as survived, ROUND(100.0 * SUM(Survived) / COUNT(*), 1) as survival_rate_pct FROM raw.titanic GROUP BY SibSp + Parch, Pclass ORDER BY family_size, Pclass",
        "purpose": "Break down the family size survival pattern by class to see if the family-size-3 peak holds across all classes or is driven by one class",
        "source": "raw"
    }
}