diff --git a/src/main/java/org/opensearch/flowframework/workflow/RegisterLocalModelStep.java b/src/main/java/org/opensearch/flowframework/workflow/RegisterLocalModelStep.java
index c2176c334..5dd6b2773 100644
--- a/src/main/java/org/opensearch/flowframework/workflow/RegisterLocalModelStep.java
+++ b/src/main/java/org/opensearch/flowframework/workflow/RegisterLocalModelStep.java
@@ -21,6 +21,7 @@
 import org.opensearch.ml.common.model.TextEmbeddingModelConfig.FrameworkType;
 import org.opensearch.ml.common.model.TextEmbeddingModelConfig.TextEmbeddingModelConfigBuilder;
 import org.opensearch.ml.common.transport.register.MLRegisterModelInput;
+import org.opensearch.ml.common.transport.register.MLRegisterModelInput.MLRegisterModelInputBuilder;
 import org.opensearch.ml.common.transport.register.MLRegisterModelResponse;
 
 import java.util.List;
@@ -163,15 +164,20 @@ public void onFailure(Exception e) {
 
             MLModelConfig modelConfig = modelConfigBuilder.build();
 
-            MLRegisterModelInput mlInput = MLRegisterModelInput.builder()
+            MLRegisterModelInputBuilder mlInputBuilder = MLRegisterModelInput.builder()
                 .modelName(modelName)
                 .version(modelVersion)
                 .modelFormat(modelFormat)
                 .modelGroupId(modelGroupId)
                 .hashValue(modelContentHashValue)
                 .modelConfig(modelConfig)
-                .url(url)
-                .build();
+                .url(url);
+
+            if (description != null) {
+                mlInputBuilder.description(description);
+            }
+
+            MLRegisterModelInput mlInput = mlInputBuilder.build();
 
             mlClient.register(mlInput, actionListener);
         } else {
diff --git a/src/main/java/org/opensearch/flowframework/workflow/RegisterRemoteModelStep.java b/src/main/java/org/opensearch/flowframework/workflow/RegisterRemoteModelStep.java
index 85e46a8cb..4dedc8bf2 100644
--- a/src/main/java/org/opensearch/flowframework/workflow/RegisterRemoteModelStep.java
+++ b/src/main/java/org/opensearch/flowframework/workflow/RegisterRemoteModelStep.java
@@ -117,17 +117,19 @@ public void onFailure(Exception e) {
 
         if (Stream.of(modelName, functionName, connectorId).allMatch(x -> x != null)) {
 
-            MLRegisterModelInputBuilder builder = MLRegisterModelInput.builder();
+            MLRegisterModelInputBuilder builder = MLRegisterModelInput.builder()
+                .functionName(functionName)
+                .modelName(modelName)
+                .connectorId(connectorId);
 
             if (modelGroupId != null) {
                 builder.modelGroupId(modelGroupId);
             }
+            if (description != null) {
+                builder.description(description);
+            }
+            MLRegisterModelInput mlInput = builder.build();
 
-            MLRegisterModelInput mlInput = builder.functionName(functionName)
-                .modelName(modelName)
-                .description(description)
-                .connectorId(connectorId)
-                .build();
             mlClient.register(mlInput, actionListener);
         } else {
             registerRemoteModelFuture.completeExceptionally(