When you add Statistical to your Discord server, it requests the following permissions:
But why do we need these permissions?
This is needed to send update messages in the channel you've used to track a YouTube channel.
This is needed to send the update embed whenever a channel recieves a subscriber update.
Attach Files is also needed to send images of graphs when clicking on the View growth graphs button or by running /channel.
This is needed for when ping_role is specified when tracking a channel. Learn more about the ping_role option in the tracking documentation.
If you don't plan on using ping_role, you can disable the permission. You can always enable it later if you need to.