```json { "action": "tool_call", "reasoning": "The question asks for a classification of all columns in the dataset. The dataset card shows one raw table (raw.epoch_ai_benchmarks with 69 columns). To classify columns by their role (identifiers, categorical dimensions, numeric metrics, dates/times), I should use inspect_columns to get detailed metadata including semantic_role, rough_kind, and phys_type for all columns. This will give me the authoritative classification.", "tool": "inspect_columns", "args": { "table": "epoch_ai_benchmarks" } } ```