{
    "action": "tool_call",
    "reasoning": "No evidence is available in this turn, so I need to ground the segmentation answer. I'll start with the distribution of funding round type, the main candidate segment.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT \"InvestmentnType\" AS investment_type, COUNT(*) AS deals FROM raw.startup_funding GROUP BY 1 ORDER BY deals DESC LIMIT 25",
        "purpose": "Distribution of funding round type labels to assess segmentation and the need for cleanup",
        "source": "raw"
    }
}