<invoke name="tool_call"> <parameter name="reasoning">Use the profiling metadata to get null counts for all columns across the 5 tables in one query, keeping only columns with nulls and computing percent of rows.</parameter> <parameter name="tool">query_sql</parameter> <parameter name="args">{"sql": "SELECT c.table_name, c.column_name, c.null_count, t.row_count, ROUND(100.0 * c.null_count / t.row_count, 1) AS pct_missing FROM analytics.column_overview c JOIN analytics.table_overview t ON c.table_name = t.table_name WHERE c.null_count > 0 ORDER BY pct_missing DESC, c.table_name, c.column_name", "purpose": "Null counts and % missing per column per table", "source": "raw"}</parameter> </invoke> w