diff --git a/core/scripts/generate-proxy-class.php b/core/scripts/generate-proxy-class.php
index d5f0e43..da76b23 100644
--- a/core/scripts/generate-proxy-class.php
+++ b/core/scripts/generate-proxy-class.php
@@ -1,6 +1,16 @@
 #!/usr/bin/env php
 <?php
 
+/**
+ * @file
+ * A script to generate proxy classes for lazy services.
+ *
+ * For help, type this command from the root directory of an installed Drupal
+ * site: php core/scripts/generate-proxy-class.php -h generate-proxy-class
+ *
+ * @ingroup container
+ */
+
 use Drupal\Core\Command\GenerateProxyClassApplication;
 use Drupal\Core\DrupalKernel;
 use Drupal\Core\ProxyBuilder\ProxyBuilder;