My terminology may be out of date,I would refer to 'easy to please','eager to please'and,to construct an example of my own,'quick to take offence'as examples as adjectival phrases.
It is easy to describe many things by using a single word,a simple adjective - a red rose, a blue sky. But,it is not always that easy when describing,say, a person's nature or character,more than one word may be nesessary,a phrase. He has a very easy going nature andit is easy to make him happy, to please him. Hence, he is easy to please.He is always trying to help and to please other people.Hence,he is eager to please.He is very sensitive and easily offended. Hence,he is quick to take offence.
American English has some of my favourite examples,remembered from old movies.The old hill billy who was always annoyed at his wife who was always washing the dishes or polishing the furniture.He complained she was the godammed dish-washin'est,furniture polishin'est woman you ever met. All right, so it was an old movie and my memory is not what it was.