I need to classify all columns in this dataset by their role. Let me start by getting a comprehensive view of the columns across all tables. ```json { "action": "tool_call", "reasoning": "To classify columns by role (identifiers, categorical dimensions, numeric metrics, dates/times), I need to examine the column metadata across all tables. The analytics.column_overview view contains semantic_role, rough_kind, and key_role which will help classify columns. I'll query this metadata view to get a complete picture.", "tool": "query_sql", "args": { "sql": "SELECT table_name, column_name, phys_type, semantic_role, rough_kind, key_role, aggregation_role, null_count, distinct_count, uniqueness_score FROM analytics.column_overview ORDER BY table_name, column_name", "purpose": "Get comprehensive column metadata to classify all columns by their role (identifier, dimension, metric, temporal)", "source": "raw" } } ```