diff --git a/.github/workflows/pr-preview.yml b/.github/workflows/pr-preview.yml
index c8048f0..fdf4767 100644
--- a/.github/workflows/pr-preview.yml
+++ b/.github/workflows/pr-preview.yml
@@ -11,7 +11,9 @@ on:
 concurrency: preview-${{ github.ref }}
 
 permissions:
+  # Used by `pr-preview-action` to push pr preview build files to related branch
   contents: write
+  # Used by `pr-preview-action` to leave a comment on the PR with the preview link
   pull-requests: write
 
 jobs: