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

(cherry picked from commit 7be2acb2f3)

tests/unit_tests/mcp_service/chart/tool/test_generate_chart.py

@@ -363,6 +363,8 @@ def _make_mock_chart(chart_id: int = 42) -> Mock:
     chart.datasource_name = "test_table"
     chart.datasource_type = "table"
     chart.description = None
+    chart.certified_by = None
+    chart.certification_details = None
     chart.cache_timeout = None
     chart.changed_by = None
     chart.changed_by_name = "admin"
@@ -394,6 +396,20 @@ class TestChartSerializationEagerLoading:
         assert result.tags == []
         assert result.owners == []
 
+    def test_serialize_chart_object_with_certification_fields(self):
+        """serialize_chart_object correctly serializes non-None certification values."""
+        from superset.mcp_service.chart.schemas import serialize_chart_object
+
+        chart = _make_mock_chart()
+        chart.certified_by = "Data Team"
+        chart.certification_details = "Verified Q1 2026 metrics"
+
+        result = serialize_chart_object(chart)
+
+        assert result is not None
+        assert result.certified_by == "Data Team"
+        assert result.certification_details == "Verified Q1 2026 metrics"
+
     def test_serialize_chart_object_fails_on_detached_instance(self):
         """serialize_chart_object raises when accessing lazy attrs on detached
         instance — this is the bug scenario that the eager-loading fix prevents."""

tests/unit_tests/mcp_service/chart/tool/test_list_charts.py

@@ -46,6 +46,8 @@ def mock_chart():
     chart.datasource_name = "test_dataset"
     chart.datasource_type = "table"
     chart.description = "Test chart"
+    chart.certified_by = None
+    chart.certification_details = None
     chart.url = "/chart/1"
     chart.changed_by_name = "admin"
     chart.changed_on = None
@@ -197,20 +199,21 @@ class TestChartDefaultColumnFiltering:
         """Test that minimal default columns are properly defined."""
         from superset.mcp_service.common.schema_discovery import CHART_DEFAULT_COLUMNS
 
-        # Required minimal columns must be present
-        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))
 
         # Heavy columns should NOT be in defaults
         assert "form_data" not in CHART_DEFAULT_COLUMNS
         assert "query_context" not in CHART_DEFAULT_COLUMNS
-        assert "description" not in CHART_DEFAULT_COLUMNS
         assert "datasource_name" not in CHART_DEFAULT_COLUMNS
         assert "uuid" not in CHART_DEFAULT_COLUMNS