diff --git a/lib/class-wp-rest-block-types-controller.php b/lib/class-wp-rest-block-types-controller.php
index c489462586f60..b8592a9419319 100644
--- a/lib/class-wp-rest-block-types-controller.php
+++ b/lib/class-wp-rest-block-types-controller.php
@@ -79,11 +79,11 @@ public function register_routes() {
 			array(
 				'args'   => array(
 					'name'      => array(
-						'description' => __( 'Block name', 'gutenberg' ),
+						'description' => __( 'Block name.', 'gutenberg' ),
 						'type'        => 'string',
 					),
 					'namespace' => array(
-						'description' => __( 'Block namespace', 'gutenberg' ),
+						'description' => __( 'Block namespace.', 'gutenberg' ),
 						'type'        => 'string',
 					),
 				),