<invoke name="query_sql"> <parameter name="sql">SELECT column_name, phys_type, semantic_role, rough_kind, null_count, distinct_count, min_value, max_value, measure_unit FROM analytics.column_overview WHERE table_name = 'bedtime_screentime_sleep_debt'</parameter> <parameter name="purpose">List all columns with types, roles, and ranges to describe their meaning</parameter> <parameter name="source">raw</parameter> </invoke>