{
    "action": "tool_call",
    "reasoning": "I've reviewed the evidence and found several patterns, but I need to explore one more dimension to identify the most counterintuitive finding. The data shows that PhD holders have the LOWEST average salary ($113,728) compared to all other education levels, despite typically requiring the most education. This is surprising, but I want to verify if this holds across experience levels or if there's an interaction effect. Let me check the salary distribution for PhD holders across experience levels to see if they're concentrated in lower experience bands, which might explain this paradox.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT experience_level, COUNT(*) as job_count, AVG(salary_usd) as avg_salary, MEDIAN(salary_usd) as median_salary FROM raw.ai_job_dataset WHERE education_required = 'PhD' GROUP BY experience_level ORDER BY experience_level",
        "purpose": "Check if PhD holders are disproportionately concentrated in lower experience levels, which would explain their lower average salary",
        "source": "raw"
    }
}