I was referencing usual launchers with a rich set of features. As fas as I remember, one can also disable most of the permissions for no a as well, but this will kill all cool features.

Well sure, but that also means it's rather limited in what it does. In theory if it had no permissions, it couldn't even list the installed apps.

So I guess what you want to say is that it has some permissions, but none that leave the direct context of launching apps?

But even then... do you include a search box in that? Should that show recently opened files in apps, too? A rather common feature those contextual per-app run-actions, but they require some way of either the launcher getting this from the app, or in turn the app supplying this action to the launcher. Include a web search in that box? Sync settings? Show notifications? Gestures? All of these require a host of permissions.