{
    "action": "tool_call",
    "reasoning": "My earlier draft cited numbers, but no tool results are in the evidence, so I can't rely on it. I'll re-ground the answer by profiling data quality in one query: nulls, negatives, rate ranges, entrances exceeding page views, unique views exceeding page views, and extremes.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS n_rows, COUNT(\"PAGE VIEWS\") AS nn_pv, COUNT(\"UNIQUE VIEWS\") AS nn_uv, COUNT(\"ENTRANCES\") AS nn_ent, COUNT(\"BOUNCE RATE (%)\") AS nn_bounce, COUNT(\"EXIT RATE (%)\") AS nn_exit, SUM(CASE WHEN \"PAGE VIEWS\" < 0 OR \"UNIQUE VIEWS\" < 0 OR \"ENTRANCES\" < 0 OR \"AVERAGE TIME ON PAGE (SECONDS)\" < 0 THEN 1 ELSE 0 END) AS negatives, SUM(CASE WHEN \"BOUNCE RATE (%)\" < 0 OR \"BOUNCE RATE (%)\" > 100 OR \"EXIT RATE (%)\" < 0 OR \"EXIT RATE (%)\" > 100 THEN 1 ELSE 0 END) AS rate_out_of_range, SUM(CASE WHEN \"ENTRANCES\" > \"PAGE VIEWS\" THEN 1 ELSE 0 END) AS ent_gt_pv, SUM(CASE WHEN \"UNIQUE VIEWS\" > \"PAGE VIEWS\" THEN 1 ELSE 0 END) AS uv_gt_pv, MEDIAN(\"PAGE VIEWS\") AS median_pv, QUANTILE_CONT(\"PAGE VIEWS\", 0.99) AS p99_pv, MAX(\"PAGE VIEWS\") AS max_pv, MAX(\"ENTRANCES\") AS max_ent, MAX(\"AVERAGE TIME ON PAGE (SECONDS)\") AS max_time FROM raw.Website_Analytics",
        "purpose": "Profile data quality: nulls, negatives, out-of-range rates, logical inconsistencies, outliers",
        "source": "raw"
    }
}