WoWDB

According to its tooltip in the Toy Box UI, Gamon's Braid is "Garrison: Inn."  If you build an Inn, each day a random NPC will visit who will offer his/her quest for your garrison followers to complete for a special reward.

If the associated datamined spell information is accurate (and if I'm interpreting it all correctly...), Gamon's Braid will shapeshift your character model to Gamon's model.

The Toy Box allows players to store vanity items in a manner similar to companions and mounts, without requiring physical storage space. The Toy Box will accessible through the user interface, as part of what is currently the Mounts And Pets interface.  The Toy Box is account wide, so you will only need to acquire this item on one character.