diff --git a/java-vertexai/google-cloud-vertexai/src/main/java/com/google/cloud/vertexai/generativeai/ChatSession.java b/java-vertexai/google-cloud-vertexai/src/main/java/com/google/cloud/vertexai/generativeai/ChatSession.java
index 3f4ad24702b6..3f1d1b1f9ba5 100644
--- a/java-vertexai/google-cloud-vertexai/src/main/java/com/google/cloud/vertexai/generativeai/ChatSession.java
+++ b/java-vertexai/google-cloud-vertexai/src/main/java/com/google/cloud/vertexai/generativeai/ChatSession.java
@@ -251,7 +251,12 @@ private Optional<ResponseStream<GenerateContentResponse>> getCurrentResponseStre
     }
   }
 
-  /** Set the history to a list of Content */
+  /**
+   * Sets the history to a list of Content.
+   *
+   * @param history A list of {@link Content} containing interleaving conversation between "user"
+   *     and "model".
+   */
   public void setHistory(List<Content> history) {
     this.history = new ArrayList<>(history);
   }