diff --git a/libs/binder/ndk/include_ndk/android/binder_ibinder.h b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
index 9e2050b..78f2d3a 100644
--- a/libs/binder/ndk/include_ndk/android/binder_ibinder.h
+++ b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
@@ -150,6 +150,11 @@
 /**
  * This is called whenever a transaction needs to be processed by a local implementation.
  *
+ * This method will be called after the equivalent of
+ * android.os.Parcel#enforceInterface is called. That is, the interface
+ * descriptor associated with the AIBinder_Class descriptor will already be
+ * checked.
+ *
  * \param binder the object being transacted on.
  * \param code implementation-specific code representing which transaction should be taken.
  * \param in the implementation-specific input data to this transaction.
@@ -452,12 +457,14 @@
  */
 
 /**
- * Creates a parcel to start filling out for a transaction. This may add data to the parcel for
- * security, debugging, or other purposes. This parcel is to be sent via AIBinder_transact and it
- * represents the input data to the transaction. It is recommended to check if the object is local
- * and call directly into its user data before calling this as the parceling and unparceling cost
- * can be avoided. This AIBinder must be either built with a class or associated with a class before
- * using this API.
+ * Creates a parcel to start filling out for a transaction. This will add a header to the
+ * transaction that corresponds to android.os.Parcel#writeInterfaceToken. This may add debugging
+ * or other information to the transaction for platform use or to enable other features to work. The
+ * contents of this header is a platform implementation detail, and it is required to use
+ * libbinder_ndk. This parcel is to be sent via AIBinder_transact and it represents the input data
+ * to the transaction. It is recommended to check if the object is local and call directly into its
+ * user data before calling this as the parceling and unparceling cost can be avoided. This AIBinder
+ * must be either built with a class or associated with a class before using this API.
  *
  * This does not affect the ownership of binder. When this function succeeds, the in parcel's
  * ownership is passed to the caller. At this point, the parcel can be filled out and passed to