diff --git a/core/modules/system/entity.api.php b/core/modules/system/entity.api.php
index e69a92af19e6b356c4dd9c42ac1f1025f2888deb..d188375a87bb4b36b95c74c667e2331c85b429c4 100644
--- a/core/modules/system/entity.api.php
+++ b/core/modules/system/entity.api.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Hooks provided the Entity module.
+ * Hooks and documentation related to entities.
  */
 
 use Drupal\Core\Entity\FieldableEntityInterface;
diff --git a/core/modules/system/menu.api.php b/core/modules/system/menu.api.php
index cb04c594c655d191c3bf21423715ffd5028d8415..95be071c76a8df2acc1bfc50dacd637eb7777e5a 100644
--- a/core/modules/system/menu.api.php
+++ b/core/modules/system/menu.api.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Hooks related to the Menu system.
+ * Hooks and documentation related to the menu system, routing, and links.
  */
 
 /**
diff --git a/core/modules/system/module.api.php b/core/modules/system/module.api.php
index 52b77afc329a85a2fd21f762224751737d34e724..9d5005ee5dc4b69c42b64fb7722b03dfdcd9d7ae 100644
--- a/core/modules/system/module.api.php
+++ b/core/modules/system/module.api.php
@@ -1,7 +1,8 @@
 <?php
+
 /**
  * @file
- * Hooks provided by Drupal core and the System module.
+ * Hooks related to module and update systems.
  */
 
 use Drupal\Core\Utility\UpdateException;
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index b1a868fd751935d2b440d16d1a68ee3e6fd991f4..bd391ed7ebf0e1213ebe29f0d237b42f9a128d49 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Hooks provided by Drupal core and the System module.
+ * Hooks provided by the System module.
  */
 
 use Drupal\Component\Utility\SafeMarkup;
diff --git a/core/modules/system/theme.api.php b/core/modules/system/theme.api.php
index 08181b8bfa26bba2a9b2c0b8fe7483ac8327e65b..9e08b873fa61a06768f8d5a1cc6bae7916c223b1 100644
--- a/core/modules/system/theme.api.php
+++ b/core/modules/system/theme.api.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * @file
+ * Hooks and documentation related to the theme and render system.
+ */
+
 /**
  * @defgroup themeable Theme system overview
  * @{