```json { "table_name": "columns_catalog", "table_type_tags": [ {"tag": "dimension", "confidence": 0.95} ], "primary_type": "dimension", "insufficient_evidence": false, "entity": { "columns": ["id"], "unique_per_row": true }, "time_axis": null, "reasoning": "The entity is id with Uniqueness 1.000 (every row unique). The table catalogs column metadata — each row describes one column from a table in tables_catalog (tables_catalog_id RPUV 79.28 references the sibling table). The provenance columns (_ingestion_timestamp, _batch_id, _source_file, _source_system) are synthetic load-time metadata and carry no evidence. No usable time axis exists beyond provenance. Entity unique per row, no action axis → dimension." } ```