diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php
index aea415910c..a9ca5553ad 100644
--- a/wp-admin/includes/plugin.php
+++ b/wp-admin/includes/plugin.php
@@ -2276,7 +2276,7 @@ function user_can_access_admin_page() {
  * @global array $new_allowed_options
  *
  * @param array $options
- * @return array
+ * @return array Updated allowed options.
  */
 function option_update_filter( $options ) {
 	global $new_allowed_options;
@@ -2297,7 +2297,7 @@ function option_update_filter( $options ) {
  *
  * @param array        $new_options
  * @param string|array $options
- * @return array
+ * @return array Updated allowed options.
  */
 function add_allowed_options( $new_options, $options = '' ) {
 	if ( '' === $options ) {
@@ -2332,7 +2332,7 @@ function add_allowed_options( $new_options, $options = '' ) {
  *
  * @param array        $del_options
  * @param string|array $options
- * @return array
+ * @return array Updated allowed options.
  */
 function remove_allowed_options( $del_options, $options = '' ) {
 	if ( '' === $options ) {
diff --git a/wp-admin/includes/upgrade.php b/wp-admin/includes/upgrade.php
index c8235c314f..04b7016b83 100644
--- a/wp-admin/includes/upgrade.php
+++ b/wp-admin/includes/upgrade.php
@@ -2831,7 +2831,7 @@ function get_alloptions_110() {
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $setting Option name.
- * @return mixed
+ * @return mixed Option value.
  */
 function __get_option( $setting ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.FunctionDoubleUnderscore
 	global $wpdb;
@@ -3374,7 +3374,7 @@ function make_db_current_silent( $tables = 'all' ) {
  *
  * @param string $theme_name The name of the theme.
  * @param string $template   The directory name of the theme.
- * @return bool
+ * @return bool True on success, false on failure.
  */
 function make_site_theme_from_oldschool( $theme_name, $template ) {
 	$home_path   = get_home_path();
diff --git a/wp-admin/includes/user.php b/wp-admin/includes/user.php
index 2f348ba841..f597cac132 100644
--- a/wp-admin/includes/user.php
+++ b/wp-admin/includes/user.php
@@ -306,7 +306,7 @@ function get_user_to_edit( $user_id ) {
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int $user_id User ID.
- * @return array
+ * @return object[] The user's draft posts, with 'ID' and 'post_title' keys.
  */
 function get_users_drafts( $user_id ) {
 	global $wpdb;
@@ -603,7 +603,7 @@ function use_ssl_preference( $user ) {
  * @since MU (3.0.0)
  *
  * @param string $text
- * @return string
+ * @return string User site invitation email message.
  */
 function admin_created_user_email( $text ) {
 	$roles = get_editable_roles();
diff --git a/wp-admin/includes/widgets.php b/wp-admin/includes/widgets.php
index 682f596d94..20cb5e159f 100644
--- a/wp-admin/includes/widgets.php
+++ b/wp-admin/includes/widgets.php
@@ -69,7 +69,7 @@ function wp_list_widgets() {
  *
  * @param array $a First array.
  * @param array $b Second array.
- * @return int
+ * @return int Comparison result.
  */
 function _sort_name_callback( $a, $b ) {
 	return strnatcasecmp( $a['name'], $b['name'] );
@@ -129,7 +129,7 @@ function wp_list_widget_controls( $sidebar, $sidebar_name = '' ) {
  * @global array $wp_registered_widgets
  *
  * @param array $params
- * @return array
+ * @return array Widget control arguments.
  */
 function wp_list_widget_controls_dynamic_sidebar( $params ) {
 	global $wp_registered_widgets;
@@ -157,7 +157,7 @@ function wp_list_widget_controls_dynamic_sidebar( $params ) {
  * @global array $wp_registered_widgets
  *
  * @param string $id_base
- * @return int
+ * @return int Next available widget ID number.
  */
 function next_widget_id_number( $id_base ) {
 	global $wp_registered_widgets;
@@ -185,7 +185,7 @@ function next_widget_id_number( $id_base ) {
  * @global array $sidebars_widgets
  *
  * @param array $sidebar_args
- * @return array
+ * @return array Passed through value of `$sidebar_args` param.
  */
 function wp_widget_control( $sidebar_args ) {
 	global $wp_registered_widgets, $wp_registered_widget_controls, $sidebars_widgets;
@@ -322,7 +322,7 @@ function wp_widget_control( $sidebar_args ) {
 
 /**
  * @param string $classes
- * @return string
+ * @return string Modified body classes.
  */
 function wp_widgets_access_body_class( $classes ) {
 	return "$classes widgets_access ";
diff --git a/wp-includes/block-supports/elements.php b/wp-includes/block-supports/elements.php
index 5678dfc0fc..c699b5badb 100644
--- a/wp-includes/block-supports/elements.php
+++ b/wp-includes/block-supports/elements.php
@@ -27,7 +27,7 @@ function wp_get_elements_class_name( $block ) {
  *
  * @param  array $block   Block object.
  * @param  array $options Per element type options e.g. whether to skip serialization.
- * @return boolean Whether the block needs an elements class name.
+ * @return bool Whether the block needs an elements class name.
  */
 function wp_should_add_elements_class_name( $block, $options ) {
 	if ( ! isset( $block['attrs']['style']['elements'] ) ) {
diff --git a/wp-includes/class-wp-theme-json-resolver.php b/wp-includes/class-wp-theme-json-resolver.php
index 3246992a42..1924d1a471 100644
--- a/wp-includes/class-wp-theme-json-resolver.php
+++ b/wp-includes/class-wp-theme-json-resolver.php
@@ -681,7 +681,7 @@ class WP_Theme_JSON_Resolver {
 	 *
 	 * @since 5.9.0
 	 *
-	 * @return integer|null
+	 * @return int|null ID for a post of type `wp_global_styles`, or null if not available.
 	 */
 	public static function get_user_global_styles_post_id() {
 		if ( null !== static::$user_custom_post_type_id ) {
@@ -704,7 +704,7 @@ class WP_Theme_JSON_Resolver {
 	 * @since 5.9.0 Added a check in the parent theme.
 	 * @deprecated 6.2.0 Use wp_theme_has_theme_json() instead.
 	 *
-	 * @return bool
+	 * @return bool Whether the active theme has a theme.json file.
 	 */
 	public static function theme_has_support() {
 		_deprecated_function( __METHOD__, '6.2.0', 'wp_theme_has_theme_json()' );
@@ -780,7 +780,7 @@ class WP_Theme_JSON_Resolver {
 	 *
 	 * @param array  $variation Theme.json shaped style variation object.
 	 * @param string $scope     Scope to check e.g. theme, block etc.
-	 * @return boolean
+	 * @return bool Whether the supplied style variation matches the provided scope.
 	 */
 	private static function style_variation_has_scope( $variation, $scope ) {
 		if ( 'block' === $scope ) {
@@ -805,7 +805,7 @@ class WP_Theme_JSON_Resolver {
 	 *              Added basic caching for read theme.json partial files.
 	 *
 	 * @param string $scope The scope or type of style variation to retrieve e.g. theme, block etc.
-	 * @return array
+	 * @return array The style variations defined by the theme.
 	 */
 	public static function get_style_variations( $scope = 'theme' ) {
 		$variation_files    = array();
diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index a2d7409d0c..36dea1418d 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -2769,7 +2769,7 @@ function wp_update_comment( $commentarr, $wp_error = false ) {
  * @since 2.5.0
  *
  * @param bool $defer
- * @return bool
+ * @return bool Whether comment counting is deferred.
  */
 function wp_defer_comment_counting( $defer = null ) {
 	static $_defer = false;
@@ -3371,7 +3371,7 @@ function weblog_ping( $server = '', $path = '' ) {
  * @see wp_http_validate_url()
  *
  * @param string $source_uri
- * @return string
+ * @return string Validated source URI.
  */
 function pingback_ping_source_uri( $source_uri ) {
 	return (string) wp_http_validate_url( $source_uri );
diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index e50c3b3eee..e6ff44d123 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -803,7 +803,7 @@ function wp_replace_in_html_tags( $haystack, $replace_pairs ) {
  * @access private
  *
  * @param array $matches preg_replace_callback matches array
- * @return string
+ * @return string Text with newlines replaced with placeholders.
  */
 function _autop_newline_preservation_helper( $matches ) {
 	return str_replace( "\n", '<WPPreserveNewline />', $matches[0] );
@@ -4680,7 +4680,7 @@ function esc_js( $text ) {
  * @since 2.8.0
  *
  * @param string $text
- * @return string
+ * @return string Escaped text.
  */
 function esc_html( $text ) {
 	$safe_text = wp_check_invalid_utf8( $text );
@@ -4705,7 +4705,7 @@ function esc_html( $text ) {
  * @since 2.8.0
  *
  * @param string $text
- * @return string
+ * @return string Escaped text.
  */
 function esc_attr( $text ) {
 	$safe_text = wp_check_invalid_utf8( $text );
@@ -4730,7 +4730,7 @@ function esc_attr( $text ) {
  * @since 3.1.0
  *
  * @param string $text
- * @return string
+ * @return string Escaped text.
  */
 function esc_textarea( $text ) {
 	$safe_text = htmlspecialchars( $text, ENT_QUOTES, get_option( 'blog_charset' ) );
@@ -4809,7 +4809,7 @@ EOF;
  * @since 6.5.5 Allow hyphens in tag names (i.e. custom elements).
  *
  * @param string $tag_name
- * @return string
+ * @return string Sanitized tag name.
  */
 function tag_escape( $tag_name ) {
 	$safe_tag = strtolower( preg_replace( '/[^a-zA-Z0-9-_:]/', '', $tag_name ) );
@@ -5683,7 +5683,7 @@ function _sanitize_text_fields( $str, $keep_newlines = false ) {
  *
  * @param string $path   A path.
  * @param string $suffix If the filename ends in suffix this will also be cut off.
- * @return string
+ * @return string The base name of the given path.
  */
 function wp_basename( $path, $suffix = '' ) {
 	return urldecode( basename( str_replace( array( '%2F', '%5C' ), '/', urlencode( $path ) ), $suffix ) );
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index bb19b8e5f9..68a29f444f 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -6568,7 +6568,7 @@ function wp_timezone_override_offset() {
  *
  * @param array $a
  * @param array $b
- * @return int
+ * @return int Comparison result.
  */
 function _wp_timezone_choice_usort_callback( $a, $b ) {
 	// Don't use translated versions of Etc.
@@ -6625,7 +6625,7 @@ function _wp_timezone_choice_usort_callback( $a, $b ) {
  *
  * @param string $selected_zone Selected timezone.
  * @param string $locale        Optional. Locale to load the timezones in. Default current site locale.
- * @return string
+ * @return string HTML select element for timezones.
  */
 function wp_timezone_choice( $selected_zone, $locale = null ) {
 	static $mo_loaded = false, $locale_loaded = null;
@@ -6827,7 +6827,7 @@ function wp_timezone_choice( $selected_zone, $locale = null ) {
  * @see https://core.trac.wordpress.org/ticket/8497
  *
  * @param string $str Header comment to clean up.
- * @return string
+ * @return string Cleaned header comment.
  */
 function _cleanup_header_comment( $str ) {
 	return trim( preg_replace( '/\s*(?:\*\/|\?>).*/', '', $str ) );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ef1f22f80d..0a2035d21e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '7.0-alpha-61269';
+$wp_version = '7.0-alpha-61270';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.