diff --git a/core/java/android/app/appfunctions/AppFunctionException.java b/core/java/android/app/appfunctions/AppFunctionException.java
index cbd1d93..c8d80d3 100644
--- a/core/java/android/app/appfunctions/AppFunctionException.java
+++ b/core/java/android/app/appfunctions/AppFunctionException.java
@@ -29,7 +29,14 @@
 import java.lang.annotation.RetentionPolicy;
 import java.util.Objects;
 
-/** Represents an app function related errors. */
+/**
+ * Represents an app function related error.
+ *
+ * <p>This exception may include an {@link AppFunctionException#getExtras() Bundle}
+ * containing additional error-specific metadata.
+ *
+ * <p>The AppFunction SDK can expose structured APIs by packing and unpacking this Bundle.
+ */
 @FlaggedApi(FLAG_ENABLE_APP_FUNCTION_MANAGER)
 public final class AppFunctionException extends Exception implements Parcelable {
     /**
diff --git a/core/java/android/app/appfunctions/ExecuteAppFunctionRequest.java b/core/java/android/app/appfunctions/ExecuteAppFunctionRequest.java
index 1557815..a88198a 100644
--- a/core/java/android/app/appfunctions/ExecuteAppFunctionRequest.java
+++ b/core/java/android/app/appfunctions/ExecuteAppFunctionRequest.java
@@ -27,7 +27,16 @@
 
 import java.util.Objects;
 
-/** A request to execute an app function. */
+/**
+ * A request to execute an app function.
+ *
+ * <p>The {@link ExecuteAppFunctionRequest#getParameters()} contains the parameters for the function
+ * to be executed in a GenericDocument. Structured classes defined in the AppFunction SDK can be
+ * converted into GenericDocuments.
+ *
+ * <p>The {@link ExecuteAppFunctionRequest#getExtras()} provides any extra metadata for the request.
+ * Structured APIs can be exposed in the SDK by packing and unpacking this Bundle.
+ */
 @FlaggedApi(FLAG_ENABLE_APP_FUNCTION_MANAGER)
 public final class ExecuteAppFunctionRequest implements Parcelable {
     @NonNull
diff --git a/core/java/android/app/appfunctions/ExecuteAppFunctionResponse.java b/core/java/android/app/appfunctions/ExecuteAppFunctionResponse.java
index acad43b..a4952f4 100644
--- a/core/java/android/app/appfunctions/ExecuteAppFunctionResponse.java
+++ b/core/java/android/app/appfunctions/ExecuteAppFunctionResponse.java
@@ -27,7 +27,16 @@
 
 import java.util.Objects;
 
-/** The response to an app function execution. */
+/**
+ * The response to an app function execution.
+ *
+ * <p>The {@link ExecuteAppFunctionResponse#getResultDocument()} contains the function's return
+ * value as a GenericDocument. This can be converted back into a structured class using the
+ * AppFunction SDK.
+ *
+ * <p>The {@link ExecuteAppFunctionResponse#getExtras()} provides any extra metadata returned by the
+ * function. The AppFunction SDK can expose structured APIs by packing and unpacking this Bundle.
+ */
 @FlaggedApi(FLAG_ENABLE_APP_FUNCTION_MANAGER)
 public final class ExecuteAppFunctionResponse implements Parcelable {
     @NonNull