diff --git a/wp-includes/class-wp-http-encoding.php b/wp-includes/class-wp-http-encoding.php
index a85bdf13a3..33314826f7 100644
--- a/wp-includes/class-wp-http-encoding.php
+++ b/wp-includes/class-wp-http-encoding.php
@@ -27,7 +27,7 @@ class WP_Http_Encoding {
 	 * @param int    $level    Optional. Compression level, 9 is highest. Default 9.
 	 * @param string $supports Optional, not used. When implemented it will choose
 	 *                         the right compression based on what the server supports.
-	 * @return string|false False on failure.
+	 * @return string|false Compressed string on success, false on failure.
 	 */
 	public static function compress( $raw, $level = 9, $supports = null ) {
 		return gzdeflate( $raw, $level );
@@ -45,7 +45,7 @@ class WP_Http_Encoding {
 	 *
 	 * @param string $compressed String to decompress.
 	 * @param int    $length     The optional length of the compressed data.
-	 * @return string|false False on failure.
+	 * @return string|false Decompressed string on success, false on failure.
 	 */
 	public static function decompress( $compressed, $length = null ) {
 
@@ -98,7 +98,7 @@ class WP_Http_Encoding {
 	 * @link https://www.php.net/manual/en/function.gzinflate.php#77336
 	 *
 	 * @param string $gzData String to decompress.
-	 * @return string|false False on failure.
+	 * @return string|false Decompressed string on success, false on failure.
 	 */
 	public static function compatible_gzinflate( $gzData ) {
 
diff --git a/wp-includes/cron.php b/wp-includes/cron.php
index 08ed7fb483..e3bd917e25 100644
--- a/wp-includes/cron.php
+++ b/wp-includes/cron.php
@@ -865,7 +865,7 @@ function wp_get_schedules() {
  *
  * @param string $hook Action hook to identify the event.
  * @param array  $args Optional. Arguments passed to the event's callback function.
- * @return string|false False, if no schedule. Schedule name on success.
+ * @return string|false Schedule name on success, false if no schedule.
  */
 function wp_get_schedule( $hook, $args = array() ) {
 	$schedule = false;
@@ -947,7 +947,7 @@ function wp_get_ready_cron_jobs() {
  * @since 2.1.0
  * @access private
  *
- * @return array|false CRON info array.
+ * @return array|false Cron info array on success, false on failure.
  */
 function _get_cron_array() {
 	$cron = get_option( 'cron' );
diff --git a/wp-includes/l10n.php b/wp-includes/l10n.php
index b9935d9967..bddac3ff7d 100644
--- a/wp-includes/l10n.php
+++ b/wp-includes/l10n.php
@@ -998,8 +998,8 @@ function load_child_theme_textdomain( $domain, $path = false ) {
  * @param string $handle Name of the script to register a translation domain to.
  * @param string $domain Optional. Text domain. Default 'default'.
  * @param string $path   Optional. The full file path to the directory containing translation files.
- * @return string|false False if the script textdomain could not be loaded, the translated strings
- *                      in JSON encoding otherwise.
+ * @return string|false The translated strings in JSON encoding on success,
+ *                      false if the script textdomain could not be loaded.
  */
 function load_script_textdomain( $handle, $domain = 'default', $path = null ) {
 	$wp_scripts = wp_scripts();
@@ -1129,7 +1129,8 @@ function load_script_textdomain( $handle, $domain = 'default', $path = null ) {
  * @param string|false $file   Path to the translation file to load. False if there isn't one.
  * @param string       $handle Name of the script to register a translation domain to.
  * @param string       $domain The text domain.
- * @return string|false The JSON-encoded translated strings for the given script handle and text domain. False if there are none.
+ * @return string|false The JSON-encoded translated strings for the given script handle and text domain.
+ *                      False if there are none.
  */
 function load_script_translations( $file, $handle, $domain ) {
 	/**
diff --git a/wp-includes/nav-menu.php b/wp-includes/nav-menu.php
index 10f2e77931..9261a4a5c5 100644
--- a/wp-includes/nav-menu.php
+++ b/wp-includes/nav-menu.php
@@ -13,7 +13,7 @@
  * @since 3.0.0
  *
  * @param int|string|WP_Term $menu Menu ID, slug, name, or object.
- * @return WP_Term|false False if $menu param isn't supplied or term does not exist, menu object if successful.
+ * @return WP_Term|false Menu object on success, false if $menu param isn't supplied or term does not exist.
  */
 function wp_get_nav_menu_object( $menu ) {
 	$menu_obj = false;
diff --git a/wp-includes/post.php b/wp-includes/post.php
index a0562578c6..e3b2eef4d7 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -6223,7 +6223,7 @@ function wp_get_attachment_url( $attachment_id = 0 ) {
  * @since 4.6.0
  *
  * @param int $post_id Optional. Attachment ID. Default is the ID of the global `$post`.
- * @return string|false False on failure. Attachment caption on success.
+ * @return string|false Attachment caption on success, false on failure. 
  */
 function wp_get_attachment_caption( $post_id = 0 ) {
 	$post_id = (int) $post_id;
@@ -6256,7 +6256,7 @@ function wp_get_attachment_caption( $post_id = 0 ) {
  * @since 2.1.0
  *
  * @param int $post_id Optional. Attachment ID. Default 0.
- * @return string|false False on failure. Thumbnail file path on success.
+ * @return string|false Thumbnail file path on success, false on failure.
  */
 function wp_get_attachment_thumb_file( $post_id = 0 ) {
 	$post_id = (int) $post_id;
@@ -6296,7 +6296,7 @@ function wp_get_attachment_thumb_file( $post_id = 0 ) {
  * @since 2.1.0
  *
  * @param int $post_id Optional. Attachment ID. Default 0.
- * @return string|false False on failure. Thumbnail URL on success.
+ * @return string|false Thumbnail URL on success, false on failure.
  */
 function wp_get_attachment_thumb_url( $post_id = 0 ) {
 	$post_id = (int) $post_id;
diff --git a/wp-includes/shortcodes.php b/wp-includes/shortcodes.php
index 90ca735dae..62d1d1e644 100644
--- a/wp-includes/shortcodes.php
+++ b/wp-includes/shortcodes.php
@@ -299,8 +299,8 @@ function get_shortcode_regex( $tagnames = null ) {
  *
  * @global array $shortcode_tags
  *
- * @param array $m Regular expression match array
- * @return string|false False on failure.
+ * @param array $m Regular expression match array.
+ * @return string|false Shortcode output on success, false on failure.
  */
 function do_shortcode_tag( $m ) {
 	global $shortcode_tags;
diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php
index 5055b612c6..623144e5f0 100644
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -4724,7 +4724,7 @@ function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' )
  *
  * @param int    $term_id  Term ID.
  * @param string $taxonomy Taxonomy name.
- * @return int|false False on error.
+ * @return int|false Parent term ID on success, false on failure.
  */
 function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) {
 	$term = get_term( $term_id, $taxonomy );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d4597a22ba..d94e6598cd 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49962';
+$wp_version = '5.7-alpha-49963';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php
index 8c5ddc2762..c2d6396d18 100644
--- a/wp-includes/widgets.php
+++ b/wp-includes/widgets.php
@@ -879,11 +879,15 @@ function dynamic_sidebar( $index = 1 ) {
  *
  * @global array $wp_registered_widgets
  *
- * @param callable|false $callback      Optional, Widget callback to check. Default false.
- * @param int|false      $widget_id     Optional. Widget ID. Optional, but needed for checking. Default false.
- * @param string|false   $id_base       Optional. The base ID of a widget created by extending WP_Widget. Default false.
- * @param bool           $skip_inactive Optional. Whether to check in 'wp_inactive_widgets'. Default true.
- * @return string|false False if widget is not active or id of sidebar in which the widget is active.
+ * @param callable|false $callback      Optional. Widget callback to check. Default false.
+ * @param int|false      $widget_id     Optional. Widget ID. Optional, but needed for checking.
+ *                                      Default false.
+ * @param string|false   $id_base       Optional. The base ID of a widget created by extending WP_Widget.
+ *                                      Default false.
+ * @param bool           $skip_inactive Optional. Whether to check in 'wp_inactive_widgets'.
+ *                                      Default true.
+ * @return string|false ID of the sidebar in which the widget is active,
+ *                      false if the widget is not active.
  */
 function is_active_widget( $callback = false, $widget_id = false, $id_base = false, $skip_inactive = true ) {
 	global $wp_registered_widgets;