I would avoid summoning the goode folk until one has mastered warding and protections, as well as done serious research into what the fae are. Folktales and legends are to be taken seriously.
They are a range of spirits, and quite easy to offend. They range from the wights of the land, to small animal/child-like beings (gnomes), to the spirits of the dead, to the watchers, or fallen angels. They are not tinkerbells, but rather beings that operate differently than human morality.