```json { "action": "tool_call", "reasoning": "The question asks for columns with missing values and their percentages across the dataset. I need to compute null counts and percentages for all columns. Since the card says column ownership is not listed (97 columns across 2 tables), I'll start by inspecting the columns of both tables to see their names and null counts, then write SQL to calculate missing percentages for columns that have nulls.", "tool": "inspect_columns", "args": { "table": "raw.adsl" } } ```