{
    "action": "tool_call",
    "reasoning": "I've found that 3 fatal adverse events occurred but were marked as NOT serious (AESER='N'), which is highly counterintuitive since death is typically the most serious outcome possible. However, I need to verify the seriousness criteria columns to understand if these deaths triggered ANY of the standard seriousness flags (hospitalization, life-threatening, disability, etc.) to confirm this is truly anomalous.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT USUBJID, AETERM, AEDECOD, AEOUT, AESER, AESDTH, AESLIFE, AESHOSP, AESDISAB, AEREL, AESTDTC FROM raw.ae WHERE AEOUT = 'FATAL'",
        "purpose": "Check all seriousness criteria flags for the 3 fatal events to confirm whether deaths were truly marked as non-serious across all dimensions",
        "source": "raw"
    }
}