Which OAuth scope is needed for GET /api/v1/scheduled_statuses?

I used https://scheduler.mastodon.tools/ for scheduling toots. At first I tried to give it only the read:statuses and write:statuses permissions. However that did not work. When calling GET /api/v1/scheduled_statuses the request failed with a 403 response:

{"error":"This action is outside the authorized scopes"}

It worked when I gave the app permission for all read, but that’s more than I would have liked. Can anybody tell me what exact scope is needed to get scheduled toots? Thanks!