Sign in with your Twitter account to write statement started. We never post anything without your permission. So why are you asking to be able to do that?
Unfortunately, this level is the same one that is used for following and unfollowing and updating your profile etc. If there was a permission level to just send the Tweet with the link to your post, that would be the one used, but it isn’t possible to just ask for that. Services that do anything on your Twitter account without your permission are evil, nasty and deserve to be shut down. An essay can have many purposes, but the basic structure is the same no matter what.