{
    "action": "tool_call",
    "reasoning": "The evidence shows non-serious adverse events (AESER='N') include 3 FATAL outcomes, which is counterintuitive since fatal events should always be classified as serious. I need to verify this is real data and not a coding error by examining the actual fatal cases to see if there's a pattern or explanation.",
    "tool": "query_sql",
    "purpose": "Examine the 3 fatal non-serious adverse events to understand what happened and verify this counterintuitive classification",
    "args": {
        "sql": "SELECT USUBJID, AETERM, AEDECOD, AESER, AEOUT, AESEV, AEREL, AESTDTC, AEENDTC FROM raw.ae WHERE AESER = 'N' AND AEOUT = 'FATAL'",
        "source": "raw"
    }
}