diff --git a/core/modules/media/src/MediaSourceEntityConstraintsInterface.php b/core/modules/media/src/MediaSourceEntityConstraintsInterface.php
index 29c6e92b37e62c73dcabb512bb1fd3e8232212e2..2d860e19d09d9cf10b4c0d4d6797bc9ef556fc3a 100644
--- a/core/modules/media/src/MediaSourceEntityConstraintsInterface.php
+++ b/core/modules/media/src/MediaSourceEntityConstraintsInterface.php
@@ -20,7 +20,8 @@ interface MediaSourceEntityConstraintsInterface extends MediaSourceInterface {
    * Gets media source-specific validation constraints for a media item.
    *
    * @return \Symfony\Component\Validator\Constraint[]
-   *   An array of validation constraint definitions, keyed by constraint name.
+   *   An array of validation constraint definitions, keyed by plugin IDs. The
+   *   corresponding values are options for each validation plugin.
    *   Each constraint definition can be used for instantiating
    *   \Symfony\Component\Validator\Constraint objects.
    */
diff --git a/core/modules/media/src/MediaSourceFieldConstraintsInterface.php b/core/modules/media/src/MediaSourceFieldConstraintsInterface.php
index b6b535f2fceea35891eff22f3fe32f26ca6fc74f..cbbed25834186f2a42365d8bb1908435a8b4da13 100644
--- a/core/modules/media/src/MediaSourceFieldConstraintsInterface.php
+++ b/core/modules/media/src/MediaSourceFieldConstraintsInterface.php
@@ -20,7 +20,8 @@ interface MediaSourceFieldConstraintsInterface extends MediaSourceInterface {
    * Gets media source-specific validation constraints for a source field.
    *
    * @return \Symfony\Component\Validator\Constraint[]
-   *   An array of validation constraint definitions, keyed by constraint name.
+   *   An array of validation constraint definitions, keyed by plugin IDs. The
+   *   corresponding values are options for each validation plugin.
    *   Each constraint definition can be used for instantiating
    *   \Symfony\Component\Validator\Constraint objects.
    */