What does the term "full service" include?

What does the term "full service" include? The tuscl glossary is vague on this. Does it count when she only sits on your cock and massages your shaft (but not the head) with her pussy lips? Or when there's only a brief shallow penetration, like when she holds on to it to prevent it from going all the way in? I've cum across both these more frequently recently, including last night! I don't consider the first to be FS. But the second (shallow penetration) counts as FS in my book.