diff --git a/src/wp-includes/customize/class-wp-customize-partial.php b/src/wp-includes/customize/class-wp-customize-partial.php
index be9bccce83..f75ac43945 100644
--- a/src/wp-includes/customize/class-wp-customize-partial.php
+++ b/src/wp-includes/customize/class-wp-customize-partial.php
@@ -68,7 +68,7 @@ class WP_Customize_Partial {
 	 * IDs for settings tied to the partial.
 	 *
 	 * @since 4.5.0
-	 * @var array
+	 * @var string[]
 	 */
 	public $settings;
 
@@ -134,10 +134,27 @@ class WP_Customize_Partial {
 	 *
 	 * @param WP_Customize_Selective_Refresh $component Customize Partial Refresh plugin instance.
 	 * @param string                         $id        Control ID.
-	 * @param array                          $args      {
-	 *     Optional. Arguments to override class property defaults.
+	 * @param array                          $args {
+	 *     Optional. Array of properties for the new Partials object. Default empty array.
 	 *
-	 *     @type array|string $settings All settings IDs tied to the partial. If undefined, `$id` will be used.
+	 *     @type string   $type                  Type of the partial to be created.
+	 *     @type string   $selector              The jQuery selector to find the container element for the partial, that is,
+	 *                                           a partial's placement.
+	 *     @type string[] $settings              IDs for settings tied to the partial. If undefined, `$id` will be used.
+	 *     @type string   $primary_setting       The ID for the setting that this partial is primarily responsible for
+	 *                                           rendering. If not supplied, it will default to the ID of the first setting.
+	 *     @type string   $capability            Capability required to edit this partial.
+	 *                                           Normally this is empty and the capability is derived from the capabilities
+	 *                                           of the associated `$settings`.
+	 *     @type callable $render_callback       Render callback.
+	 *                                           Callback is called with one argument, the instance of WP_Customize_Partial.
+	 *                                           The callback can either echo the partial or return the partial as a string,
+	 *                                           or return false if error.
+	 *     @type bool     $container_inclusive   Whether the container element is included in the partial, or if only
+	 *                                           the contents are rendered.
+	 *     @type bool     $fallback_refresh      Whether to refresh the entire preview in case a partial cannot be refreshed.
+	 *                                           A partial render is considered a failure if the render_callback returns
+	 *                                           false.
 	 * }
 	 */
 	public function __construct( WP_Customize_Selective_Refresh $component, $id, $args = array() ) {
diff --git a/src/wp-includes/customize/class-wp-customize-selective-refresh.php b/src/wp-includes/customize/class-wp-customize-selective-refresh.php
index 7a02bc3cf0..e8658b30a2 100644
--- a/src/wp-includes/customize/class-wp-customize-selective-refresh.php
+++ b/src/wp-includes/customize/class-wp-customize-selective-refresh.php
@@ -83,29 +83,13 @@ final class WP_Customize_Selective_Refresh {
 	 *
 	 * @since 4.5.0
 	 *
-	 * @param WP_Customize_Partial|string $id   Customize Partial object, or Panel ID.
-	 * @param array                       $args {
-	 *  Optional. Array of properties for the new Partials object. Default empty array.
+	 * @see WP_Customize_Partial::__construct()
 	 *
-	 *  @type string   $type                  Type of the partial to be created.
-	 *  @type string   $selector              The jQuery selector to find the container element for the partial, that is, a partial's placement.
-	 *  @type array    $settings              IDs for settings tied to the partial.
-	 *  @type string   $primary_setting       The ID for the setting that this partial is primarily responsible for
-	 *                                        rendering. If not supplied, it will default to the ID of the first setting.
-	 *  @type string   $capability            Capability required to edit this partial.
-	 *                                        Normally this is empty and the capability is derived from the capabilities
-	 *                                        of the associated `$settings`.
-	 *  @type callable $render_callback       Render callback.
-	 *                                        Callback is called with one argument, the instance of WP_Customize_Partial.
-	 *                                        The callback can either echo the partial or return the partial as a string,
-	 *                                        or return false if error.
-	 *  @type bool     $container_inclusive   Whether the container element is included in the partial, or if only
-	 *                                        the contents are rendered.
-	 *  @type bool     $fallback_refresh      Whether to refresh the entire preview in case a partial cannot be refreshed.
-	 *                                        A partial render is considered a failure if the render_callback returns
-	 *                                        false.
-	 * }
-	 * @return WP_Customize_Partial             The instance of the panel that was added.
+	 * @param WP_Customize_Partial|string $id   Customize Partial object, or Partial ID.
+	 * @param array                       $args Optional. Array of properties for the new Partials object.
+	 *                                          See WP_Customize_Partial::__construct() for information
+	 *                                          on accepted arguments. Default empty array.
+	 * @return WP_Customize_Partial The instance of the partial that was added.
 	 */
 	public function add_partial( $id, $args = array() ) {
 		if ( $id instanceof WP_Customize_Partial ) {