diff --git a/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Customizations/Models/TelemetryItem.cs b/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Customizations/Models/TelemetryItem.cs
index 915841941ac1e..6cf8d0f9beb2f 100644
--- a/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Customizations/Models/TelemetryItem.cs
+++ b/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Customizations/Models/TelemetryItem.cs
@@ -27,15 +27,15 @@ public TelemetryItem(Activity activity, ref ActivityTagsProcessor activityTagsPr
             {
                 if (activityTagsProcessor.activityType.HasFlag(OperationType.V2))
                 {
-                    Tags[ContextTagKeys.AiOperationName.ToString()] = TraceHelper.GetOperationNameV2(activity, ref activityTagsProcessor.MappedTags);
+                    Tags[ContextTagKeys.AiOperationName.ToString()] = TraceHelper.GetOperationNameV2(activity, ref activityTagsProcessor.MappedTags).Truncate(SchemaConstants.Tags_AiOperationName_MaxLength);
                 }
                 else if (activityTagsProcessor.activityType.HasFlag(OperationType.Http))
                 {
-                    Tags[ContextTagKeys.AiOperationName.ToString()] = TraceHelper.GetOperationName(activity, ref activityTagsProcessor.MappedTags);
+                    Tags[ContextTagKeys.AiOperationName.ToString()] = TraceHelper.GetOperationName(activity, ref activityTagsProcessor.MappedTags).Truncate(SchemaConstants.Tags_AiOperationName_MaxLength);
                 }
                 else
                 {
-                    Tags[ContextTagKeys.AiOperationName.ToString()] = activity.DisplayName;
+                    Tags[ContextTagKeys.AiOperationName.ToString()] = activity.DisplayName.Truncate(SchemaConstants.Tags_AiOperationName_MaxLength);
                 }
 
                 // Set ip in case of server spans only.
@@ -79,8 +79,8 @@ public TelemetryItem(string name, TelemetryItem telemetryItem, ActivitySpanId ac
                 Tags["ai.user.userAgent"] = userAgent;
             }
 
-            Tags[ContextTagKeys.AiCloudRole.ToString()] = telemetryItem.Tags[ContextTagKeys.AiCloudRole.ToString()];
-            Tags[ContextTagKeys.AiCloudRoleInstance.ToString()] = telemetryItem.Tags[ContextTagKeys.AiCloudRoleInstance.ToString()];
+            Tags[ContextTagKeys.AiCloudRole.ToString()] = telemetryItem.Tags[ContextTagKeys.AiCloudRole.ToString()].Truncate(SchemaConstants.Tags_AiCloudRole_MaxLength);
+            Tags[ContextTagKeys.AiCloudRoleInstance.ToString()] = telemetryItem.Tags[ContextTagKeys.AiCloudRoleInstance.ToString()].Truncate(SchemaConstants.Tags_AiCloudRoleInstance_MaxLength);
             Tags[ContextTagKeys.AiInternalSdkVersion.ToString()] = SdkVersionUtils.s_sdkVersion.Truncate(SchemaConstants.Tags_AiInternalSdkVersion_MaxLength);
             InstrumentationKey = telemetryItem.InstrumentationKey;
 
@@ -116,8 +116,8 @@ public TelemetryItem(DateTime time, AzureMonitorResource? resource, string instr
         private void SetResourceSdkVersionAndIkey(AzureMonitorResource? resource, string instrumentationKey)
         {
             InstrumentationKey = instrumentationKey;
-            Tags[ContextTagKeys.AiCloudRole.ToString()] = resource?.RoleName;
-            Tags[ContextTagKeys.AiCloudRoleInstance.ToString()] = resource?.RoleInstance;
+            Tags[ContextTagKeys.AiCloudRole.ToString()] = resource?.RoleName.Truncate(SchemaConstants.Tags_AiCloudRole_MaxLength);
+            Tags[ContextTagKeys.AiCloudRoleInstance.ToString()] = resource?.RoleInstance.Truncate(SchemaConstants.Tags_AiCloudRoleInstance_MaxLength);
             Tags[ContextTagKeys.AiInternalSdkVersion.ToString()] = SdkVersionUtils.s_sdkVersion.Truncate(SchemaConstants.Tags_AiInternalSdkVersion_MaxLength);
         }
 
@@ -131,7 +131,7 @@ private void SetAuthenticatedUserId(ref ActivityTagsProcessor activityTagsProces
         {
             if (activityTagsProcessor.EndUserId != null)
             {
-                Tags[ContextTagKeys.AiUserAuthUserId.ToString()] = activityTagsProcessor.EndUserId;
+                Tags[ContextTagKeys.AiUserAuthUserId.ToString()] = activityTagsProcessor.EndUserId.Truncate(SchemaConstants.Tags_AiUserAuthUserId_MaxLength);
             }
         }
     }
diff --git a/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Internals/SchemaConstants.cs b/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Internals/SchemaConstants.cs
index 5c7022d478fc6..b1871e06f4675 100644
--- a/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Internals/SchemaConstants.cs
+++ b/sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/src/Internals/SchemaConstants.cs
@@ -116,6 +116,12 @@ internal static class SchemaConstants
         public const int TelemetryEnvelope_Time_MaxLength = 64;
         public const int TelemetryEnvelope_InstrumentationKey_MaxLength = 40;
 
+        public const int Tags_AiOperationId_MaxLength = 128;
+        public const int Tags_AiOperationName_MaxLength = 1024;
+        public const int Tags_AiOperationParentId_MaxLength = 512;
+        public const int Tags_AiUserAuthUserId_MaxLength = 1024;
+        public const int Tags_AiCloudRole_MaxLength = 256;
+        public const int Tags_AiCloudRoleInstance_MaxLength = 256;
         public const int Tags_AiInternalSdkVersion_MaxLength = 64;
     }
 }