I believe you, that, according to your company sop, there is no requirement to tell atc. But as the SIA shows you, they were not able the cover the outcome of this.
If you tell ATC in a busy environment that you will practice autoland, they will never protect the respective areas around the runway. Instead they tell you to land manually, because autoland is not save on an unprotected ILS beam. Even if Chuck Yeager, or someone who thinks he is, is on the controls.