fix(mcp): add description and certification fields to default list tool columns (#39017)

(cherry picked from commit 7be2acb2f3)

tests/unit_tests/mcp_service/system/tool/test_get_schema.py

@@ -153,16 +153,18 @@ class TestModelSchemaInfo:
 
     def test_chart_default_columns(self):
         """Test chart default columns include required minimal set."""
-        required_columns = {
+        assert set(CHART_DEFAULT_COLUMNS) == {
             "id",
             "slice_name",
             "viz_type",
+            "description",
+            "certified_by",
+            "certification_details",
             "url",
+            "changed_on",
             "changed_on_humanized",
         }
-        assert required_columns.issubset(set(CHART_DEFAULT_COLUMNS))
-        # These should NOT be in defaults
-        assert "description" not in CHART_DEFAULT_COLUMNS
+        # Heavy columns should NOT be in defaults
         assert "form_data" not in CHART_DEFAULT_COLUMNS
         assert "uuid" not in CHART_DEFAULT_COLUMNS
 
@@ -291,12 +293,17 @@ class TestGetSchemaToolViaClient:
             assert id_col["type"] == "int"
             assert id_col["is_default"] is True
 
-            # Find a non-default column (description is on the model)
+            # description is now a default column
             desc_col = next(
                 (c for c in select_cols if c["name"] == "description"), None
             )
             assert desc_col is not None
-            assert desc_col["is_default"] is False
+            assert desc_col["is_default"] is True
+
+            # Find a non-default column (uuid is on the model but not default)
+            uuid_col = next((c for c in select_cols if c["name"] == "uuid"), None)
+            assert uuid_col is not None
+            assert uuid_col["is_default"] is False
 
 
 class TestGetSchemaEdgeCases: