diff --git a/core/modules/action/action.api.php b/core/modules/action/action.api.php
index bdd7c0f..e1a3f4c 100644
--- a/core/modules/action/action.api.php
+++ b/core/modules/action/action.api.php
@@ -8,7 +8,7 @@
 /**
  * Executes code after an action is deleted.
  *
- * @param $aid
+ * @param string $aid
  *   The action ID.
  */
 function hook_action_delete($aid) {
diff --git a/core/modules/action/src/ActionFormBase.php b/core/modules/action/src/ActionFormBase.php
index 96bb63d..eb862cc 100644
--- a/core/modules/action/src/ActionFormBase.php
+++ b/core/modules/action/src/ActionFormBase.php
@@ -101,7 +101,7 @@ public function form(array $form, FormStateInterface $form_state) {
    * Determines if the action already exists.
    *
    * @param string $id
-   *   The action ID
+   *   The action ID.
    *
    * @return bool
    *   TRUE if the action exists, FALSE otherwise.
diff --git a/core/modules/action/src/Plugin/Action/EmailAction.php b/core/modules/action/src/Plugin/Action/EmailAction.php
index ae9bd00..9897d56 100644
--- a/core/modules/action/src/Plugin/Action/EmailAction.php
+++ b/core/modules/action/src/Plugin/Action/EmailAction.php
@@ -52,13 +52,14 @@ class EmailAction extends ConfigurableActionBase implements ContainerFactoryPlug
   protected $logger;
 
   /**
-   * The mail manager
+   * The mail manager service.
    *
    * @var \Drupal\Core\Mail\MailManagerInterface
    */
   protected $mailManager;
 
-  /** The language manager.
+  /**
+   * The language manager service.
    *
    * @var \Drupal\Core\Language\LanguageManagerInterface
    */
@@ -79,9 +80,9 @@ class EmailAction extends ConfigurableActionBase implements ContainerFactoryPlug
    *   The entity manager.
    * @param \Psr\Log\LoggerInterface $logger
    *   A logger instance.
-   * @param \Drupal\Core\Mail\MailManagerInterface
+   * @param \Drupal\Core\Mail\MailManagerInterface $mail_manager
    *   The mail manager.
-   * @param \Drupal\Core\Language\LanguageManagerInterface
+   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
    *   The language manager.
    */
   public function __construct(array $configuration, $plugin_id, $plugin_definition, Token $token, EntityManagerInterface $entity_manager, LoggerInterface $logger, MailManagerInterface $mail_manager, LanguageManagerInterface $language_manager) {
diff --git a/core/modules/action/src/Plugin/Action/MessageAction.php b/core/modules/action/src/Plugin/Action/MessageAction.php
index c87b606..0db843b 100644
--- a/core/modules/action/src/Plugin/Action/MessageAction.php
+++ b/core/modules/action/src/Plugin/Action/MessageAction.php
@@ -34,6 +34,15 @@ class MessageAction extends ConfigurableActionBase implements ContainerFactoryPl
 
   /**
    * Constructs a MessageAction object.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin ID for the plugin instance.
+   * @param array $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Utility\Token $token
+   *   The token service.
    */
   public function __construct(array $configuration, $plugin_id, $plugin_definition, Token $token) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);