```json { "action": "tool_call", "reasoning": "To identify the most important numeric metric, I need to understand the dataset's purpose and key measures. The card shows several numeric columns across tables (attendance, scores, rankings, points). I'll read the overview insight to understand what this dataset is fundamentally about and what its primary analytical focus is, which will help determine the most important metric.", "tool": "read_insight", "args": { "section": "overview" } } ```