diff --git a/src/Kompas.Mcp.Core/Modeling/PartModeler.Sketch.cs b/src/Kompas.Mcp.Core/Modeling/PartModeler.Sketch.cs
index 01adf8c..9062646 100644
--- a/src/Kompas.Mcp.Core/Modeling/PartModeler.Sketch.cs
+++ b/src/Kompas.Mcp.Core/Modeling/PartModeler.Sketch.cs
@@ -93,7 +93,8 @@ public sealed partial class PartModeler
             ?? throw new InvalidOperationException("GetDefinition() эскиза вернул не ksSketchDefinition.");
 
         def.SetPlane(planeEntity);
-        entity.Create();
+        if (!entity.Create())
+            throw new InvalidOperationException("Create() эскиза вернул FALSE.");
 
         var editor = def.BeginEdit() as ksDocument2D
             ?? throw new InvalidOperationException("BeginEdit() не вернул ksDocument2D.");
diff --git a/src/Kompas.Mcp.Host/Tools/FeatureTools.cs b/src/Kompas.Mcp.Host/Tools/FeatureTools.cs
index 4bea927..8772cbf 100644
--- a/src/Kompas.Mcp.Host/Tools/FeatureTools.cs
+++ b/src/Kompas.Mcp.Host/Tools/FeatureTools.cs
@@ -130,7 +130,8 @@ public sealed class FeatureTools(KompasSession session, PartModeler modeler)
     {
         await session.ConnectAsync();
         var id = await modeler.LoftAsync(sketchIds, closed);
-        return $"Операция по сечениям создана ({sketchIds.Length} сечений), id={id}.";
+        var sections = sketchIds?.Distinct().Count() ?? 0;
+        return $"Операция по сечениям создана ({sections} сечений), id={id}.";
     }
 
     [McpServerTool(Name = "rebuild")]
diff --git a/tests/Kompas.Mcp.Tests/Integration/FeatureOpsTests.cs b/tests/Kompas.Mcp.Tests/Integration/FeatureOpsTests.cs
index 33a8de2..e74662f 100644
--- a/tests/Kompas.Mcp.Tests/Integration/FeatureOpsTests.cs
+++ b/tests/Kompas.Mcp.Tests/Integration/FeatureOpsTests.cs
@@ -156,6 +156,12 @@ public sealed class FeatureOpsTests
 
             var v = (await _query.GetPartInfoAsync()).Volume; // 20×20×40 = 16000
             Assert.InRange(v, 16000 * 0.9, 16000 * 1.1);
+
+            // Габарит подтверждает соединение сечений по высоте: ≈20×20×40.
+            var box = await _query.GetBoundingBoxAsync();
+            Assert.InRange(box.SizeX, 20 * 0.95, 20 * 1.05);
+            Assert.InRange(box.SizeY, 20 * 0.95, 20 * 1.05);
+            Assert.InRange(box.SizeZ, 40 * 0.95, 40 * 1.05);
         }
         finally { await _docs.CloseAsync(save: false); }
     }