diff --git a/src/wp-admin/includes/ajax-actions.php b/src/wp-admin/includes/ajax-actions.php
index e79642dc0b46e..f52f5f5c1d80f 100644
--- a/src/wp-admin/includes/ajax-actions.php
+++ b/src/wp-admin/includes/ajax-actions.php
@@ -1241,7 +1241,7 @@ function wp_ajax_get_tagcloud() {
  *
  * @since 3.1.0
  *
- * @global int $post_id
+ * @global int $post_id Post ID.
  *
  * @param string $action Action to perform.
  */
@@ -2353,9 +2353,9 @@ function wp_ajax_widgets_order() {
  *
  * @since 3.1.0
  *
- * @global array $wp_registered_widgets
- * @global array $wp_registered_widget_controls
- * @global array $wp_registered_widget_updates
+ * @global array $wp_registered_widgets         Registered widgets.
+ * @global array $wp_registered_widget_controls Registered widget controls.
+ * @global array $wp_registered_widget_updates  Registered widget updates.
  */
 function wp_ajax_save_widget() {
 	global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates;
@@ -2462,7 +2462,7 @@ function wp_ajax_save_widget() {
  *
  * @since 3.9.0
  *
- * @global WP_Customize_Manager $wp_customize
+ * @global WP_Customize_Manager $wp_customize Customizer manager object.
  */
 function wp_ajax_update_widget() {
 	global $wp_customize;
@@ -3588,7 +3588,7 @@ function wp_ajax_get_revision_diffs() {
  *
  * @since 3.8.0
  *
- * @global array $_wp_admin_css_colors
+ * @global array $_wp_admin_css_colors Registered admin CSS color schemes.
  */
 function wp_ajax_save_user_color_scheme() {
 	global $_wp_admin_css_colors;
@@ -3617,8 +3617,8 @@ function wp_ajax_save_user_color_scheme() {
  *
  * @since 3.9.0
  *
- * @global array $themes_allowedtags
- * @global array $theme_field_defaults
+ * @global array $themes_allowedtags   Allowed HTML tags for theme descriptions.
+ * @global array $theme_field_defaults Default theme fields.
  */
 function wp_ajax_query_themes() {
 	global $themes_allowedtags, $theme_field_defaults;
@@ -3750,8 +3750,8 @@ function wp_ajax_query_themes() {
  *
  * @global WP_Post    $post          Global post object.
  * @global WP_Embed   $wp_embed      WordPress Embed object.
- * @global WP_Scripts $wp_scripts
- * @global int        $content_width
+ * @global WP_Scripts $wp_scripts    Script dependencies object.
+ * @global int        $content_width Shared post content width.
  */
 function wp_ajax_parse_embed() {
 	global $post, $wp_embed, $content_width;
@@ -3891,7 +3891,7 @@ function wp_ajax_parse_embed() {
  * @since 4.0.0
  *
  * @global WP_Post    $post       Global post object.
- * @global WP_Scripts $wp_scripts
+ * @global WP_Scripts $wp_scripts Script dependencies object.
  */
 function wp_ajax_parse_media_shortcode() {
 	global $post, $wp_scripts;
diff --git a/src/wp-admin/includes/class-core-upgrader.php b/src/wp-admin/includes/class-core-upgrader.php
index 184376654295e..8a712a4afbc76 100644
--- a/src/wp-admin/includes/class-core-upgrader.php
+++ b/src/wp-admin/includes/class-core-upgrader.php
@@ -48,7 +48,7 @@ public function upgrade_strings() {
 	 * @since 2.8.0
 	 *
 	 * @global WP_Filesystem_Base $wp_filesystem                WordPress filesystem subclass.
-	 * @global callable           $_wp_filesystem_direct_method
+	 * @global callable           $_wp_filesystem_direct_method Filesystem direct method callback.
 	 *
 	 * @param object $current Response object for whether WordPress is current.
 	 * @param array  $args {
diff --git a/src/wp-admin/includes/class-custom-image-header.php b/src/wp-admin/includes/class-custom-image-header.php
index f95f9bc95dfe5..eb65605728062 100644
--- a/src/wp-admin/includes/class-custom-image-header.php
+++ b/src/wp-admin/includes/class-custom-image-header.php
@@ -268,7 +268,7 @@ public function take_action() {
 	 *
 	 * @since 3.0.0
 	 *
-	 * @global array $_wp_default_headers
+	 * @global array $_wp_default_headers Default headers registered for themes.
 	 */
 	public function process_default_headers() {
 		global $_wp_default_headers;
diff --git a/src/wp-admin/includes/class-theme-upgrader.php b/src/wp-admin/includes/class-theme-upgrader.php
index 47062d3fd60dc..9a963d433cf7e 100644
--- a/src/wp-admin/includes/class-theme-upgrader.php
+++ b/src/wp-admin/includes/class-theme-upgrader.php
@@ -746,7 +746,7 @@ public function current_after( $response, $theme ) {
 	 *
 	 * @since 2.8.0
 	 *
-	 * @global WP_Filesystem_Base $wp_filesystem Subclass
+	 * @global WP_Filesystem_Base $wp_filesystem Filesystem subclass.
 	 *
 	 * @param bool   $removed
 	 * @param string $local_destination
diff --git a/src/wp-admin/includes/class-walker-nav-menu-checklist.php b/src/wp-admin/includes/class-walker-nav-menu-checklist.php
index 099d2500762bb..b4e4f1a48049a 100644
--- a/src/wp-admin/includes/class-walker-nav-menu-checklist.php
+++ b/src/wp-admin/includes/class-walker-nav-menu-checklist.php
@@ -64,8 +64,8 @@ public function end_lvl( &$output, $depth = 0, $args = null ) {
 	 * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
 	 *              to match parent class for PHP 8 named parameter support.
 	 *
-	 * @global int        $_nav_menu_placeholder
-	 * @global int|string $nav_menu_selected_id
+	 * @global int        $_nav_menu_placeholder A placeholder for the nav menu item ID.
+	 * @global int|string $nav_menu_selected_id  The ID of the selected nav menu.
 	 *
 	 * @param string   $output            Used to append additional content (passed by reference).
 	 * @param WP_Post  $data_object       Menu item data object.
diff --git a/src/wp-admin/includes/class-walker-nav-menu-edit.php b/src/wp-admin/includes/class-walker-nav-menu-edit.php
index 66ea47bb1fd0e..44a57c0c99f26 100644
--- a/src/wp-admin/includes/class-walker-nav-menu-edit.php
+++ b/src/wp-admin/includes/class-walker-nav-menu-edit.php
@@ -49,7 +49,7 @@ public function end_lvl( &$output, $depth = 0, $args = null ) {}
 	 * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
 	 *              to match parent class for PHP 8 named parameter support.
 	 *
-	 * @global int $_wp_nav_menu_max_depth
+	 * @global int $_wp_nav_menu_max_depth The maximum depth of the nav menu.
 	 *
 	 * @param string   $output            Used to append additional content (passed by reference).
 	 * @param WP_Post  $data_object       Menu item data object.
diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index 78d6215376569..1feaeb3283bcd 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -31,7 +31,7 @@ class WP_Comments_List_Table extends WP_List_Table {
 	 *
 	 * @see WP_List_Table::__construct() for more information on default arguments.
 	 *
-	 * @global int $post_id
+	 * @global int $post_id The ID of the post to show comments for.
 	 *
 	 * @param array $args An associative array of arguments.
 	 */
@@ -224,8 +224,7 @@ public function get_per_page( $comment_status = 'all' ) {
 
 	/**
 	 * Displays a message when no comments are found.
-	 *
-	 * @global string $comment_status
+	 * @global string $comment_status The current comment status filter.
 	 */
 	public function no_items() {
 		global $comment_status;
@@ -242,9 +241,9 @@ public function no_items() {
 	/**
 	 * Returns an array of comment status links.
 	 *
-	 * @global int    $post_id
-	 * @global string $comment_status
-	 * @global string $comment_type
+	 * @global int    $post_id        The ID of the post to show comments for.
+	 * @global string $comment_status The current comment status.
+	 * @global string $comment_type   The current comment type.
 	 *
 	 * @return array<string, string> Comment status HTML links keyed by view.
 	 */
@@ -412,8 +411,8 @@ protected function get_bulk_actions() {
 	/**
 	 * Displays extra controls between bulk actions and pagination.
 	 *
-	 * @global string $comment_status
-	 * @global string $comment_type
+	 * @global string $comment_status Current comment status.
+	 * @global string $comment_type   Current comment type.
 	 *
 	 * @param string $which The location of the extra table nav markup: Either 'top' or 'bottom'.
 	 */
@@ -485,7 +484,7 @@ public function current_action() {
 	/**
 	 * Gets the list of columns.
 	 *
-	 * @global int $post_id
+	 * @global int $post_id The ID of the post comments are being shown for.
 	 *
 	 * @return string[] Array of column titles keyed by their column name.
 	 */
@@ -1011,7 +1010,7 @@ public function column_comment( $comment ) {
 	/**
 	 * Outputs the author column.
 	 *
-	 * @global string $comment_status
+	 * @global string $comment_status The current comment status.
 	 *
 	 * @param WP_Comment $comment The comment object.
 	 */
diff --git a/src/wp-admin/install.php b/src/wp-admin/install.php
index 7fcacab9bd6c9..8083e55fc115c 100644
--- a/src/wp-admin/install.php
+++ b/src/wp-admin/install.php
@@ -342,6 +342,7 @@ function display_setup_form( $error = null ) {
 /**
  * @global string    $wp_local_package Locale code of the package.
  * @global WP_Locale $wp_locale        WordPress date and time locale object.
+ * @global wpdb      $wpdb             WordPress database abstraction object.
  */
 $language = '';
 if ( ! empty( $_REQUEST['language'] ) ) {