diff --git a/includes/abilities-api/class-wp-ability-category.php b/includes/abilities-api/class-wp-ability-category.php
index 957ce5e..1a60a37 100644
--- a/includes/abilities-api/class-wp-ability-category.php
+++ b/includes/abilities-api/class-wp-ability-category.php
@@ -2,7 +2,8 @@
 /**
  * Abilities API
  *
- * Defines WP_Ability_Category class.
+ * Defines the WP_Ability_Category class for organizing and categorizing
+ * related abilities within the Abilities API.
  *
  * @package WordPress
  * @subpackage Abilities API
@@ -186,7 +187,7 @@ public function get_description(): string {
 	 *
 	 * @since 6.9.0
 	 *
-	 * @return array<string,mixed> The metadata for the ability category.
+	 * @return array<string, mixed> The metadata for the ability category.
 	 */
 	public function get_meta(): array {
 		return $this->meta;
diff --git a/includes/rest-api/class-wp-rest-abilities-init.php b/includes/rest-api/class-wp-rest-abilities-init.php
index be25ca9..8f6f3f7 100644
--- a/includes/rest-api/class-wp-rest-abilities-init.php
+++ b/includes/rest-api/class-wp-rest-abilities-init.php
@@ -23,6 +23,7 @@ class WP_REST_Abilities_Init {
 	 *
 	 * @param WP_REST_Server|null $rest_server Optional. The REST server to register routes with. Default null, which
 	 *                                         will use the main REST server instance.
+	 * @return void
 	 */
 	public static function register_routes( $rest_server = null ): void {
 		if ( ! $rest_server instanceof WP_REST_Server ) {
diff --git a/includes/rest-api/endpoints/class-wp-rest-abilities-v1-categories-controller.php b/includes/rest-api/endpoints/class-wp-rest-abilities-v1-categories-controller.php
index 2156109..a0e6bf4 100644
--- a/includes/rest-api/endpoints/class-wp-rest-abilities-v1-categories-controller.php
+++ b/includes/rest-api/endpoints/class-wp-rest-abilities-v1-categories-controller.php
@@ -40,6 +40,7 @@ class WP_REST_Abilities_V1_Categories_Controller extends WP_REST_Controller {
 	 * @since 6.9.0
 	 *
 	 * @see register_rest_route()
+	 * @return void
 	 */
 	public function register_routes(): void {
 		register_rest_route(
@@ -161,7 +162,7 @@ public function get_item( $request ) {
 	 * @since 6.9.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
-	 * @return bool True if the request has read access.
+	 * @return bool True if the request has read access, false otherwise.
 	 */
 	public function get_items_permissions_check( $request ) {
 		return current_user_can( 'read' );
@@ -173,7 +174,7 @@ public function get_items_permissions_check( $request ) {
 	 * @since 6.9.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
-	 * @return bool True if the request has read access.
+	 * @return bool True if the request has read access, false otherwise.
 	 */
 	public function get_item_permissions_check( $request ) {
 		return current_user_can( 'read' );
diff --git a/includes/rest-api/endpoints/class-wp-rest-abilities-v1-list-controller.php b/includes/rest-api/endpoints/class-wp-rest-abilities-v1-list-controller.php
index 4f59d90..bc5f350 100644
--- a/includes/rest-api/endpoints/class-wp-rest-abilities-v1-list-controller.php
+++ b/includes/rest-api/endpoints/class-wp-rest-abilities-v1-list-controller.php
@@ -40,6 +40,7 @@ class WP_REST_Abilities_V1_List_Controller extends WP_REST_Controller {
 	 * @since 6.9.0
 	 *
 	 * @see register_rest_route()
+	 * @return void
 	 */
 	public function register_routes(): void {
 		register_rest_route(
@@ -176,7 +177,7 @@ public function get_item( $request ) {
 	 * @since 6.9.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
-	 * @return bool True if the request has read access.
+	 * @return bool True if the request has read access, false otherwise.
 	 */
 	public function get_items_permissions_check( $request ) {
 		return current_user_can( 'read' );
@@ -188,7 +189,7 @@ public function get_items_permissions_check( $request ) {
 	 * @since 6.9.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
-	 * @return bool True if the request has read access.
+	 * @return bool True if the request has read access, false otherwise.
 	 */
 	public function get_item_permissions_check( $request ) {
 		return current_user_can( 'read' );
diff --git a/includes/rest-api/endpoints/class-wp-rest-abilities-v1-run-controller.php b/includes/rest-api/endpoints/class-wp-rest-abilities-v1-run-controller.php
index 36766a2..43b71f0 100644
--- a/includes/rest-api/endpoints/class-wp-rest-abilities-v1-run-controller.php
+++ b/includes/rest-api/endpoints/class-wp-rest-abilities-v1-run-controller.php
@@ -40,6 +40,7 @@ class WP_REST_Abilities_V1_Run_Controller extends WP_REST_Controller {
 	 * @since 6.9.0
 	 *
 	 * @see register_rest_route()
+	 * @return void
 	 */
 	public function register_routes(): void {
 		register_rest_route(
@@ -188,7 +189,7 @@ public function check_ability_permissions( $request ) {
 	 * @since 6.9.0
 	 *
 	 * @param WP_REST_Request $request The request object.
-	 * @return mixed|null The input parameters.
+	 * @return mixed|null The input parameters, or null if not provided.
 	 */
 	private function get_input_from_request( $request ) {
 		if ( in_array( $request->get_method(), array( 'GET', 'DELETE' ), true ) ) {