You must have a reason for saying this. Who is going to enforce this. One thing also my tool box is off limits to the tool cops. They will just have to go to a judge and get a search warrant if they want to take a look.
The US EPA is in fact having uncover agents going into mower shops and attempting to purchase the adjustment tools. Unauthorized procession of the tools and adjusting the carbs without being an authorized service center is considered tampering with an emissions control device. The old rule was that only manufacturers, distributors, and dealers were responsible, but that changed in 2010, and now the customer is also subject to fines.
From my understanding, even though a tool is sold to an authorized MTD dealer, I can't legally use that tool to adjust the carb on say a Dolmar if I wasn't an authorized dealer for the Dolmar.