diff --git a/src/main/java/com/google/cloud/agentplatform/types/GenerateMemoriesRequestDirectContentsSourceEvent.java b/src/main/java/com/google/cloud/agentplatform/types/GenerateMemoriesRequestDirectContentsSourceEvent.java
index b388b3d..e7497d3 100644
--- a/src/main/java/com/google/cloud/agentplatform/types/GenerateMemoriesRequestDirectContentsSourceEvent.java
+++ b/src/main/java/com/google/cloud/agentplatform/types/GenerateMemoriesRequestDirectContentsSourceEvent.java
@@ -27,7 +27,7 @@
 import com.google.genai.types.Content;
 import java.util.Optional;
 
-/** */
+/** None */
 @AutoValue
 @JsonDeserialize(builder = GenerateMemoriesRequestDirectContentsSourceEvent.Builder.class)
 public abstract class GenerateMemoriesRequestDirectContentsSourceEvent extends JsonSerializable {
diff --git a/src/main/java/com/google/cloud/agentplatform/types/GetAgentEngineOperationConfig.java b/src/main/java/com/google/cloud/agentplatform/types/GetAgentEngineOperationConfig.java
index ce78687..813cdb4 100644
--- a/src/main/java/com/google/cloud/agentplatform/types/GetAgentEngineOperationConfig.java
+++ b/src/main/java/com/google/cloud/agentplatform/types/GetAgentEngineOperationConfig.java
@@ -27,7 +27,7 @@
 import com.google.genai.types.HttpOptions;
 import java.util.Optional;
 
-/** */
+/** None */
 @AutoValue
 @JsonDeserialize(builder = GetAgentEngineOperationConfig.Builder.class)
 public abstract class GetAgentEngineOperationConfig extends JsonSerializable {
diff --git a/src/main/java/com/google/cloud/agentplatform/types/SandboxEnvironment.java b/src/main/java/com/google/cloud/agentplatform/types/SandboxEnvironment.java
index 0cb640d..e0e5631 100644
--- a/src/main/java/com/google/cloud/agentplatform/types/SandboxEnvironment.java
+++ b/src/main/java/com/google/cloud/agentplatform/types/SandboxEnvironment.java
@@ -93,7 +93,8 @@ public abstract class SandboxEnvironment extends JsonSerializable {
 
   /**
    * Optional. The name of the SandboxEnvironmentTemplate specified in the parent Agent Engine
-   * resource that this SandboxEnvironment is created from.
+   * resource that this SandboxEnvironment is created from. Only one of
+   * `sandbox_environment_template` and `spec` should be set.
    */
   @JsonProperty("sandboxEnvironmentTemplate")
   public abstract Optional<String> sandboxEnvironmentTemplate();
@@ -385,7 +386,8 @@ public Builder clearSandboxEnvironmentSnapshot() {
      * Setter for sandboxEnvironmentTemplate.
      *
      * <p>sandboxEnvironmentTemplate: Optional. The name of the SandboxEnvironmentTemplate specified
-     * in the parent Agent Engine resource that this SandboxEnvironment is created from.
+     * in the parent Agent Engine resource that this SandboxEnvironment is created from. Only one of
+     * `sandbox_environment_template` and `spec` should be set.
      */
     @JsonProperty("sandboxEnvironmentTemplate")
     public abstract Builder sandboxEnvironmentTemplate(String sandboxEnvironmentTemplate);