diff --git a/core/modules/menu_ui/menu_ui.module b/core/modules/menu_ui/menu_ui.module
index 3234e769766bd19e149beaad9e95a8576622d489..47009267585f2a8ace314ca19ace424688da1349 100644
--- a/core/modules/menu_ui/menu_ui.module
+++ b/core/modules/menu_ui/menu_ui.module
@@ -449,9 +449,9 @@ function menu_ui_form_node_type_form_builder($entity_type, NodeTypeInterface $ty
 /**
  * Return an associative array of the custom menus names.
  *
- * @param $all
- *   If FALSE return only user-added menus, or if TRUE also include
- *   the menus defined by the system.
+ * @param bool $all
+ *   (optional) If FALSE return only user-added menus, or if TRUE also include
+ *   the menus defined by the system. Defaults to TRUE.
  *
  * @return array
  *   An array with the machine-readable names as the keys, and human-readable
diff --git a/core/modules/menu_ui/src/MenuForm.php b/core/modules/menu_ui/src/MenuForm.php
index 09f529aca4569e4643e949119f8101f1fceadbaa..0b3064e356c59efa1ede286fb613c459b4c6d753 100644
--- a/core/modules/menu_ui/src/MenuForm.php
+++ b/core/modules/menu_ui/src/MenuForm.php
@@ -327,9 +327,9 @@ protected function buildOverviewForm(array &$form, FormStateInterface $form_stat
   /**
    * Recursive helper function for buildOverviewForm().
    *
-   * @param $tree
+   * @param \Drupal\Core\Menu\MenuLinkTreeElement[] $tree
    *   The tree retrieved by \Drupal\Core\Menu\MenuLinkTreeInterface::load().
-   * @param $delta
+   * @param int $delta
    *   The default number of menu items used in the menu weight selector is 50.
    *
    * @return array