{
    "action": "tool_call",
    "reasoning": "Compute distinct counts for the categorical (VARCHAR) columns in one query.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT COUNT(*) AS total_rows, COUNT(DISTINCT WEBSITE) AS websites, COUNT(DISTINCT \"PAGE PATH\") AS page_paths, COUNT(DISTINCT \"PAGE URL\") AS page_urls, COUNT(DISTINCT YEAR) AS years, COUNT(DISTINCT _batch_id) AS batch_ids, COUNT(DISTINCT _source_file) AS source_files, COUNT(DISTINCT _source_system) AS source_systems FROM raw.Website_Analytics",
        "purpose": "Distinct counts for all categorical/text columns plus YEAR",
        "source": "raw"
    }
}