{
    "action": "tool_call",
    "reasoning": "I have LLM usage by model, which shows cost_usd__sum as a key metric. However, I need to understand what drives these costs across the platform's operations. The overview mentioned analysis_runs track 'intent' and 'style', which would show what types of analysis consume LLM resources. Let me check if there's a gold table that breaks down LLM usage by analysis intent or purpose, as this would reveal which business use cases drive operational costs.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT * FROM llm_calls_by_created_at__yyyy_mm_dd_hh_purpose ORDER BY cost_usd__sum DESC LIMIT 20",
        "purpose": "Find LLM usage breakdown by purpose to identify which analysis types drive costs",
        "source": "gold"
    }
}