diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Access/FormModeAccessCheck.php b/core/modules/field_ui/lib/Drupal/field_ui/Access/FormModeAccessCheck.php
index 5c038066389c54e929e53671a74e78f4ea27b028..d35dd15c2f6ee05fc3143914d9cced4a77948998 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Access/FormModeAccessCheck.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Access/FormModeAccessCheck.php
@@ -14,7 +14,9 @@
 use Symfony\Component\HttpFoundation\Request;
 
 /**
- * Allows access to routes to be controlled by an '_access' boolean parameter.
+ * Defines an access check for entity form mode routes.
+ *
+ * @see \Drupal\entity\Entity\EntityFormMode
  */
 class FormModeAccessCheck implements AccessInterface {
 
diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Access/ViewModeAccessCheck.php b/core/modules/field_ui/lib/Drupal/field_ui/Access/ViewModeAccessCheck.php
index ee17c8020f72f96d718c6eab41eae07eb350307a..8e930408e9b055782f80bfac30bcf72685b2357f 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Access/ViewModeAccessCheck.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Access/ViewModeAccessCheck.php
@@ -14,7 +14,9 @@
 use Symfony\Component\HttpFoundation\Request;
 
 /**
- * Allows access to routes to be controlled by an '_access' boolean parameter.
+ * Defines an access check for entity view mode routes.
+ *
+ * @see \Drupal\entity\Entity\EntityViewMode
  */
 class ViewModeAccessCheck implements AccessInterface {