I need to identify columns with missing values and calculate the percentage of missing data for each. Let me start by checking the column metadata to see null counts. ```json { "action": "tool_call", "reasoning": "The dataset card shows raw.Iris has 150 rows and 10 columns. I need to get detailed metadata including null counts for all columns to identify which have missing values and calculate percentages.", "tool": "inspect_columns", "args": { "table": "Iris" } } ```