diff --git a/src/AutoRest.CSharp/Mgmt/Models/MgmtRestClientBuilder.cs b/src/AutoRest.CSharp/Mgmt/Models/MgmtRestClientBuilder.cs
index 9576a8c2279..c887c205628 100644
--- a/src/AutoRest.CSharp/Mgmt/Models/MgmtRestClientBuilder.cs
+++ b/src/AutoRest.CSharp/Mgmt/Models/MgmtRestClientBuilder.cs
@@ -1,25 +1,22 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
+using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using System.IO.MemoryMappedFiles;
 using System.Linq;
 using AutoRest.CSharp.Common.Input;
-using AutoRest.CSharp.Generation.Types;
 using AutoRest.CSharp.Generation.Writers;
 using AutoRest.CSharp.Input;
 using AutoRest.CSharp.Mgmt.AutoRest;
-using AutoRest.CSharp.Output.Builders;
 using AutoRest.CSharp.Output.Models;
 using AutoRest.CSharp.Output.Models.Shared;
-using AutoRest.CSharp.Output.Models.Types;
-using Microsoft.CodeAnalysis.CSharp.Syntax;
 
 namespace AutoRest.CSharp.Mgmt.Models
 {
     internal class MgmtRestClientBuilder : CmcRestClientBuilder
     {
+        private static HashSet<string> AllowedRequestParameterOrigins = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "modelerfour:synthesized/host", "modelerfour:synthesized/api-version" };
         private class ParameterCompareer : IEqualityComparer<RequestParameter>
         {
             public bool Equals([AllowNull] RequestParameter x, [AllowNull] RequestParameter y)
@@ -44,11 +41,23 @@ public MgmtRestClientBuilder(OperationGroup operationGroup)
         {
         }
 
-        public static IEnumerable<RequestParameter> GetMgmtParametersFromOperations(ICollection<Operation> operations) =>
-            operations
-                .SelectMany(op => op.Parameters.Concat(op.Requests.SelectMany(r => r.Parameters)))
-                .Where(p => p.Implementation == ImplementationLocation.Client)
-                .Distinct(new ParameterCompareer());
+        private static IReadOnlyList<RequestParameter> GetMgmtParametersFromOperations(ICollection<Operation> operations)
+        {
+            var parameters = new HashSet<RequestParameter>(new ParameterCompareer());
+            foreach (var operation in operations)
+            {
+                var clientParameters = operation.Parameters.Where(p => p.Implementation == ImplementationLocation.Client);
+                foreach (var parameter in clientParameters)
+                {
+                    if (!AllowedRequestParameterOrigins.Contains(parameter.Origin ?? string.Empty))
+                    {
+                        throw new InvalidOperationException($"'{parameter.Language.Default.Name}' with origin '{parameter.Origin}' should be method parameter for operation '{operation.OperationId}'");
+                    }
+                    parameters.Add(parameter);
+                }
+            }
+            return parameters.ToList();
+        }
 
         public override Parameter BuildConstructorParameter(RequestParameter requestParameter)
         {