Once constructed by Serv-O-Droid, Inc. for wealthy citizens and entrepreneurs, the TT-8L gatekeeper droid, also known as the gatewatcher droid and nicknamed the "tattletale", was made to be the perfect surveillance system.
Essentially, the droid was an electronic eye on a stalk. The "tattletale" was placed near a door and could poke its "eye" through a peep-hole in the door. It could then ask its master if it should admit a visitor or keep the visitor at the door. Many people considered it to be one of the most annoying droid models.