diff --git a/core/modules/search/src/Plugin/SearchInterface.php b/core/modules/search/src/Plugin/SearchInterface.php
index 5ab473b..ebf719e 100644
--- a/core/modules/search/src/Plugin/SearchInterface.php
+++ b/core/modules/search/src/Plugin/SearchInterface.php
@@ -88,10 +88,11 @@ public function execute();
    * Executes the search and builds render arrays for the result items.
    *
    * @return array
-   *   An array of render arrays of search result items (generally each item
+   *   An array that has 'items' and 'cache_tags' arrays. The 'items' array is
+   *   an array of render arrays of search result items (generally each item
    *   has '#theme' set to 'search_result'), or an empty array if there are no
-   *   results. The array should have a key 'items' with the actual results and
-   *   a key cache_tags that holds the cache tags for the entities in the result.
+   *   results. The 'cache_tags' array holds all the cache tags associated with
+   *   the items in the 'items' array.
    */
   public function buildResults();