diff --git a/src/ModelContextProtocol/Diagnostics.cs b/src/ModelContextProtocol/Diagnostics.cs
index a85aa0643..c8845228d 100644
--- a/src/ModelContextProtocol/Diagnostics.cs
+++ b/src/ModelContextProtocol/Diagnostics.cs
@@ -5,7 +5,7 @@ namespace ModelContextProtocol;
 
 internal static class Diagnostics
 {
-    internal static ActivitySource ActivitySource { get; } = new("ModelContextProtocol");
+    internal static ActivitySource ActivitySource { get; } = new("Experimental.ModelContextProtocol");
 
     /// <summary>
     /// Follows boundaries from http.server.request.duration/http.client.request.duration
@@ -24,6 +24,6 @@ internal static class Diagnostics
         HistogramBucketBoundaries = [0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 30, 60, 120, 300],
     };
 
-    internal static Meter Meter { get; } = new("ModelContextProtocol");
+    internal static Meter Meter { get; } = new("Experimental.ModelContextProtocol");
 
 }
diff --git a/tests/ModelContextProtocol.Tests/DiagnosticTests.cs b/tests/ModelContextProtocol.Tests/DiagnosticTests.cs
index 24c5430e1..583ae2743 100644
--- a/tests/ModelContextProtocol.Tests/DiagnosticTests.cs
+++ b/tests/ModelContextProtocol.Tests/DiagnosticTests.cs
@@ -17,7 +17,7 @@ public async Task Session_TracksActivities()
         var activities = new List<Activity>();
 
         using (var tracerProvider = OpenTelemetry.Sdk.CreateTracerProviderBuilder()
-            .AddSource("ModelContextProtocol")
+            .AddSource("Experimental.ModelContextProtocol")
             .AddInMemoryExporter(activities)
             .Build())
         {