diff --git a/src/wp-includes/class-wp-taxonomy.php b/src/wp-includes/class-wp-taxonomy.php
index 123b739b20..c07b07c4b5 100644
--- a/src/wp-includes/class-wp-taxonomy.php
+++ b/src/wp-includes/class-wp-taxonomy.php
@@ -237,7 +237,75 @@ final class WP_Taxonomy {
 	 * @since 4.7.0
 	 *
 	 * @param array|string $object_type Name of the object type for the taxonomy object.
-	 * @param array|string $args        Array or query string of arguments for registering a taxonomy.
+	 * @param array|string $args        {
+	 *     Array or query string of arguments for registering a taxonomy.
+	 *
+	 *     @type array         $labels                An array of labels for this taxonomy. By default, Tag labels are
+	 *                                                used for non-hierarchical taxonomies, and Category labels are used
+	 *                                                for hierarchical taxonomies. See accepted values in
+	 *                                                get_taxonomy_labels(). Default empty array.
+	 *     @type string        $description           A short descriptive summary of what the taxonomy is for. Default
+	 *                                                empty.
+	 *     @type bool          $public                Whether a taxonomy is intended for use publicly either via
+	 *                                                the admin interface or by front-end users. The default settings
+	 *                                                of `$publicly_queryable`, `$show_ui`, and `$show_in_nav_menus`
+	 *                                                are inherited from `$public`.
+	 *     @type bool          $publicly_queryable    Whether the taxonomy is publicly queryable.
+	 *                                                If not set, the default is inherited from `$public`
+	 *     @type bool          $hierarchical          Whether the taxonomy is hierarchical. Default false.
+	 *     @type bool          $show_ui               Whether to generate and allow a UI for managing terms in this
+	 *                                                taxonomy in the admin. If not set, the default is inherited from
+	 *                                                `$public` (default true).
+	 *     @type bool          $show_in_menu          Whether to show the taxonomy in the admin menu. If true, the
+	 *                                                taxonomy is shown as a submenu of the object type menu. If false, 
+	 *                                                no menu is shown. `$show_ui` must be true. If not set, default is 
+	 *                                                inherited from `$show_ui` (default true).
+	 *     @type bool          $show_in_nav_menus     Makes this taxonomy available for selection in navigation menus. If
+	 *                                                not set, the default is inherited from `$public` (default true).
+	 *     @type bool          $show_in_rest          Whether to include the taxonomy in the REST API.
+	 *     @type string        $rest_base             To change the base url of REST API route. Default is $taxonomy.
+	 *     @type string        $rest_controller_class REST API Controller class name. Default is
+	 *                                                'WP_REST_Terms_Controller'.
+	 *     @type bool          $show_tagcloud         Whether to list the taxonomy in the Tag Cloud Widget controls. If
+	 *                                                not set, the default is inherited from `$show_ui` (default true).
+	 *     @type bool          $show_in_quick_edit    Whether to show the taxonomy in the quick/bulk edit panel. It not
+	 *                                                set, the default is inherited from `$show_ui` (default true).
+	 *     @type bool          $show_admin_column     Whether to display a column for the taxonomy on its post type
+	 *                                                listing screens. Default false.
+	 *     @type bool|callable $meta_box_cb           Provide a callback function for the meta box display. If not set,
+	 *                                                post_categories_meta_box() is used for hierarchical taxonomies, and
+	 *                                                post_tags_meta_box() is used for non-hierarchical. If false, no meta
+	 *                                                box is shown.
+	 *     @type callable      $meta_box_sanitize_cb  Callback function for sanitizing taxonomy data saved from a meta
+	 *                                                box. If no callback is defined, an appropriate one is determined
+	 *                                                based on the value of `$meta_box_cb`.
+	 *     @type array         $capabilities {
+	 *         Array of capabilities for this taxonomy.
+	 *
+	 *         @type string $manage_terms Default 'manage_categories'.
+	 *         @type string $edit_terms   Default 'manage_categories'.
+	 *         @type string $delete_terms Default 'manage_categories'.
+	 *         @type string $assign_terms Default 'edit_posts'.
+	 *     }
+	 *     @type bool|array    $rewrite {
+	 *         Triggers the handling of rewrites for this taxonomy. Default true, using $taxonomy as slug. To prevent
+	 *         rewrite, set to false. To specify rewrite rules, an array can be passed with any of these keys:
+	 *
+	 *         @type string $slug         Customize the permastruct slug. Default `$taxonomy` key.
+	 *         @type bool   $with_front   Should the permastruct be prepended with WP_Rewrite::$front. Default true.
+	 *         @type bool   $hierarchical Either hierarchical rewrite tag or not. Default false.
+	 *         @type int    $ep_mask      Assign an endpoint mask. Default `EP_NONE`.
+	 *     }
+	 *     @type string        $query_var             Sets the query var key for this taxonomy. Default `$taxonomy` key. *                                                If false, a taxonomy cannot be loaded at `?{query_var}={term_slug}
+	 *                                                `. If a string, the query `?{query_var}={term_slug}` will be valid.
+	 *     @type callable      $update_count_callback Works much like a hook, in that it will be called when the count is
+	 *                                                updated. Default _update_post_term_count() for taxonomies attached
+	 *                                                to post types, which confirms that the objects are published before
+	 *                                                counting them. Default _update_generic_term_count() for taxonomies
+	 *                                                attached to other object types, such as users.
+	 *     @type bool          $_builtin              This taxonomy is a "built-in" taxonomy. INTERNAL USE ONLY!
+	 *                                                Default false.
+	 * }
 	 */
 	public function set_props( $object_type, $args ) {
 		$args = wp_parse_args( $args );
diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index 293b18b8b6..21e554facc 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -321,7 +321,11 @@ function is_taxonomy_hierarchical( $taxonomy ) {
  *
  * @param string       $taxonomy    Taxonomy key, must not exceed 32 characters.
  * @param array|string $object_type Object type or array of object types with which the taxonomy should be associated.
- * @param array|string $args        {
+ * 
+ * @see WP_Taxonomy::set_props()
+ * 
+ * @param array|string $args        Optional. Array or query string of arguments for registering a taxonomy.
+ *                                  Default empty array.{
  *     Optional. Array or query string of arguments for registering a taxonomy.
  *
  *     @type array         $labels                An array of labels for this taxonomy. By default, Tag labels are
