diff --git a/src/ModelContextProtocol.Core/Server/AIFunctionMcpServerTool.cs b/src/ModelContextProtocol.Core/Server/AIFunctionMcpServerTool.cs
index c1c4fe664..6fad7766b 100644
--- a/src/ModelContextProtocol.Core/Server/AIFunctionMcpServerTool.cs
+++ b/src/ModelContextProtocol.Core/Server/AIFunctionMcpServerTool.cs
@@ -262,7 +262,6 @@ internal Tool BuildLegacyWireProtocolTool()
             InputSchema = ProtocolTool.InputSchema,
             OutputSchema = legacyOutputSchema,
             Annotations = ProtocolTool.Annotations,
-            Execution = ProtocolTool.Execution,
             Icons = ProtocolTool.Icons,
             Meta = ProtocolTool.Meta,
         };