diff --git a/src/Controller/GenerateAltText.php b/src/Controller/GenerateAltText.php
index e471a55..86e1974 100644
--- a/src/Controller/GenerateAltText.php
+++ b/src/Controller/GenerateAltText.php
@@ -140,7 +140,7 @@ class GenerateAltText extends ControllerBase {
       ),
     ]);
     try {
-      $output = $provider->chat($input, $model);
+      $output = $provider->chat($input, $model, ['ai_image_alt_text']);
       $alt_text = $output->getNormalized()->getText();
       return new JsonResponse([
         'alt_text' => $alt_text,