Term of service should be very clear and concise. It is the legal agreement between you and a user who wants to use your add-ons. It can also be merely a disclaimer, particularly regarding the use of add-on. You can use the same term of service (TOS) for all add-ons. TOS is shown before installing addon
And before user decides to grant scopes for add-on
You should explain all the following sections in term of service: