diff --git a/core/modules/workflows/src/StateInterface.php b/core/modules/workflows/src/StateInterface.php
index 5a5442bb1d..6cc8ace95c 100644
--- a/core/modules/workflows/src/StateInterface.php
+++ b/core/modules/workflows/src/StateInterface.php
@@ -6,8 +6,8 @@
  * An interface for state value objects.
  *
  * @internal
- *   The workflow system is currently experimental and should only be leveraged
- *   by experimental modules and development releases of contributed modules.
+ *   The StateInterface should only be used by Workflows and Content Moderation.
+ *   @todo Revisit the need for this in https://www.drupal.org/node/2902309.
  */
 interface StateInterface {
 
diff --git a/core/modules/workflows/src/TransitionInterface.php b/core/modules/workflows/src/TransitionInterface.php
index 14f6d1487c..0fa159cabf 100644
--- a/core/modules/workflows/src/TransitionInterface.php
+++ b/core/modules/workflows/src/TransitionInterface.php
@@ -6,8 +6,9 @@
  * A transition value object that describes the transition between two states.
  *
  * @internal
- *   The workflow system is currently experimental and should only be leveraged
- *   by experimental modules and development releases of contributed modules.
+ *   The TransitionInterface should only be used by Workflows and Content
+ *   Moderation.
+ *   @todo Revisit the need for this in https://www.drupal.org/node/2902309.
  */
 interface TransitionInterface {