diff --git a/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgent.cs b/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgent.cs
index 567742102f..d51414769f 100644
--- a/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgent.cs
+++ b/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgent.cs
@@ -197,6 +197,12 @@ public sealed class OpenTelemetryAgent : DelegatingAIAgent, IDisposable
             return options;
         }
 
+        // Respect ChatClientAgentOptions.UseProvidedChatClientAsIs: don't decorate the chat client when the user opted out.
+        if (this.InnerAgent.GetService<ChatClientAgentOptions>()?.UseProvidedChatClientAsIs is true)
+        {
+            return options;
+        }
+
         // Capture the underlying IChatClient and check whether it is already instrumented.
         var chatClient = this.InnerAgent.GetService<IChatClient>();
         if (chatClient is null || chatClient.GetService(typeof(OpenTelemetryChatClient)) is not null)
@@ -206,9 +212,7 @@ public sealed class OpenTelemetryAgent : DelegatingAIAgent, IDisposable
 
         string? sourceName = this._sourceName;
         IChatClient WrapWithOpenTelemetry(IChatClient cc) =>
-            cc.GetService(typeof(OpenTelemetryChatClient)) is not null
-                ? cc
-                : cc.AsBuilder().UseOpenTelemetry(sourceName: sourceName).Build();
+            cc.AsBuilder().UseOpenTelemetry(sourceName: sourceName).Build();
 
         if (options is ChatClientAgentRunOptions ccOptions)
         {
diff --git a/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgentBuilderExtensions.cs b/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgentBuilderExtensions.cs
index 1ccf5b84a5..8f83a8dda1 100644
--- a/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgentBuilderExtensions.cs
+++ b/dotnet/src/Microsoft.Agents.AI/OpenTelemetryAgentBuilderExtensions.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft. All rights reserved.
 
 using System;
-using Microsoft.Extensions.AI;
 using Microsoft.Shared.Diagnostics;
 
 namespace Microsoft.Agents.AI;
@@ -49,39 +48,9 @@ public static class OpenTelemetryAgentBuilderExtensions
         this AIAgentBuilder builder,
         string? sourceName = null,
         Action<OpenTelemetryAgent>? configure = null) =>
-        builder.UseOpenTelemetry(autoWireChatClient: true, sourceName: sourceName, configure: configure);
-
-    /// <summary>
-    /// Adds OpenTelemetry instrumentation to the agent pipeline, with explicit control over whether the underlying
-    /// <see cref="IChatClient"/> of a <see cref="ChatClientAgent"/> inner agent is automatically wrapped with
-    /// <see cref="Microsoft.Extensions.AI.OpenTelemetryChatClient"/>.
-    /// </summary>
-    /// <param name="builder">The <see cref="AIAgentBuilder"/> to which OpenTelemetry support will be added.</param>
-    /// <param name="autoWireChatClient">
-    /// When <see langword="true"/>, the underlying <see cref="IChatClient"/> of a <see cref="ChatClientAgent"/> inner agent
-    /// is automatically wrapped with <see cref="Microsoft.Extensions.AI.OpenTelemetryChatClient"/> on each invocation so
-    /// that chat-level telemetry flows alongside agent-level telemetry. If the underlying chat client is already
-    /// instrumented, no additional wrapping is applied. If the inner agent is not a <see cref="ChatClientAgent"/>, no
-    /// auto-wiring is performed. Set to <see langword="false"/> to opt out of this behavior.
-    /// </param>
-    /// <param name="sourceName">
-    /// An optional source name that will be used to identify telemetry data from this agent.
-    /// If not specified, a default source name will be used.
-    /// </param>
-    /// <param name="configure">
-    /// An optional callback that provides additional configuration of the <see cref="OpenTelemetryAgent"/> instance.
-    /// This allows for fine-tuning telemetry behavior such as enabling sensitive data collection.
-    /// </param>
-    /// <returns>The <see cref="AIAgentBuilder"/> with OpenTelemetry instrumentation added, enabling method chaining.</returns>
-    /// <exception cref="ArgumentNullException"><paramref name="builder"/> is <see langword="null"/>.</exception>
-    public static AIAgentBuilder UseOpenTelemetry(
-        this AIAgentBuilder builder,
-        bool autoWireChatClient,
-        string? sourceName = null,
-        Action<OpenTelemetryAgent>? configure = null) =>
         Throw.IfNull(builder).Use((innerAgent, services) =>
         {
-            var agent = new OpenTelemetryAgent(innerAgent, sourceName, autoWireChatClient);
+            var agent = new OpenTelemetryAgent(innerAgent, sourceName);
             configure?.Invoke(agent);
 
             return agent;
diff --git a/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentBuilderExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentBuilderExtensionsTests.cs
index d5a1720f6d..3bee00d014 100644
--- a/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentBuilderExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentBuilderExtensionsTests.cs
@@ -123,59 +123,4 @@ public class OpenTelemetryAgentBuilderExtensionsTests
         Assert.True(configureWasCalled);
         Assert.IsType<OpenTelemetryAgent>(result);
     }
-
-    /// <summary>
-    /// Verify that UseOpenTelemetry with autoWireChatClient parameter works correctly.
-    /// </summary>
-    [Theory]
-    [InlineData(true)]
-    [InlineData(false)]
-    public void UseOpenTelemetry_WithAutoWireChatClientFlag_ReturnsOpenTelemetryAgent(bool autoWireChatClient)
-    {
-        // Arrange
-        var mockAgent = new Mock<AIAgent>();
-        var builder = new AIAgentBuilder(mockAgent.Object);
-
-        // Act
-        var result = builder.UseOpenTelemetry(autoWireChatClient: autoWireChatClient).Build();
-
-        // Assert
-        Assert.IsType<OpenTelemetryAgent>(result);
-    }
-
-    /// <summary>
-    /// Verify that UseOpenTelemetry with autoWireChatClient and all parameters works correctly.
-    /// </summary>
-    [Fact]
-    public void UseOpenTelemetry_WithAutoWireChatClientAndAllParameters_CallsConfigureAction()
-    {
-        // Arrange
-        var mockAgent = new Mock<AIAgent>();
-        var builder = new AIAgentBuilder(mockAgent.Object);
-        var configureWasCalled = false;
-
-        // Act
-        var result = builder.UseOpenTelemetry(
-            autoWireChatClient: false,
-            sourceName: "TestSource",
-            configure: agent =>
-            {
-                configureWasCalled = true;
-                Assert.NotNull(agent);
-            }).Build();
-
-        // Assert
-        Assert.True(configureWasCalled);
-        Assert.IsType<OpenTelemetryAgent>(result);
-    }
-
-    /// <summary>
-    /// Verify that UseOpenTelemetry with autoWireChatClient throws ArgumentNullException when builder is null.
-    /// </summary>
-    [Fact]
-    public void UseOpenTelemetry_WithAutoWireChatClient_WithNullBuilder_ThrowsArgumentNullException()
-    {
-        // Act & Assert
-        Assert.Throws<ArgumentNullException>("builder", () => ((AIAgentBuilder)null!).UseOpenTelemetry(autoWireChatClient: true));
-    }
 }
diff --git a/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentTests.cs b/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentTests.cs
index 4730cc2a84..28e192bc35 100644
--- a/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.UnitTests/OpenTelemetryAgentTests.cs
@@ -717,6 +717,27 @@ public class OpenTelemetryAgentTests
         Assert.Null(observedOptions);
     }
 
+    [Fact]
+    public async Task AutoWireChatClient_UseProvidedChatClientAsIs_DoesNotEmitChatSpan_Async()
+    {
+        var sourceName = Guid.NewGuid().ToString();
+        var activities = new List<Activity>();
+        using var tracerProvider = OpenTelemetry.Sdk.CreateTracerProviderBuilder()
+            .AddSource(sourceName)
+            .AddInMemoryExporter(activities)
+            .Build();
+
+        var fakeChatClient = new AutoWireTestChatClient();
+        var inner = new ChatClientAgent(fakeChatClient, new ChatClientAgentOptions { UseProvidedChatClientAsIs = true });
+        using var agent = new OpenTelemetryAgent(inner, sourceName);
+
+        _ = await agent.RunAsync("hi");
+
+        // UseProvidedChatClientAsIs opts out of auto-wiring, so only the invoke_agent span should be emitted.
+        var activity = Assert.Single(activities);
+        Assert.StartsWith("invoke_agent", activity.DisplayName);
+    }
+
     [Fact]
     public async Task AutoWireChatClient_AlreadyInstrumented_DoesNotDoubleWrap_Async()
     {