My benchmark expectation would be that you can either choose the breakfast included in your rate or the Glob breakfast, and then obey the rules (amount, number of items, number of people, etc.) that correspond to your choice. If you pick the Glob breakfast (IIRC normally one entree and coffee/juice), the tip is included, but if you instead pick the room rate breakfast (perhaps because it's up to a fixed amount, so you have more flexibility in what you can order), then you should tip if the rate doesn't include the tip.