```json {"action": "tool_call", "reasoning": "I will join the data dictionary with the metadata columns table to get the data types alongside the descriptions for each column.", "tool": "query_sql", "args": {"sql": "SELECT d.Table AS table_name, d.Field AS column_name, m.phys_type AS data_type, d.Description AS meaning FROM raw.data_dictionary d LEFT JOIN meta.columns m ON d.Table = m.table_name AND d.Field = m.column_name ORDER BY d.Table, d.Field", "purpose": "Get columns, data types, and meanings", "source": "raw"}} ```