List and explore Datarails Finance OS tables — discover what data is available and view one table's SCHEMA (fields, types, distinct values of a field) to understand its structure. For per-field STATISTICS (ranges, percentiles, null rates, cardinality) use the profile skill. Works with or without an open workbook — in Excel, "list my Datarails tables/models/fields" still routes HERE via the MCP connector (the Excel bridge's agent.list_functions lists workbook widgets, not org tables).