The way that a description of a property is presented to the AI is like:
// The special thing to load into the box
thing:str "fougasse" | "maritozzo" | "paratha" | "lepeshka" | "rugbrød"
Therefore you could place a better description:
"description": "Possible items for bread box, use the one that best fulfills the user needs, one of:\n{\"fougasse\":\"A French flatbread often shaped like a leaf and filled with herbs, olives, or cheese.\",\"maritozzo\":\"A Roman sweet bun filled with whipped cream.\",\"paratha\":\"An Indian flatbread made with whole wheat flour, often layered or stuffed.\",\"lepeshka\":\"A round, flat Central Asian bread, typically baked in a tandoor.\",\"rugbrød\":\"A dense Danish rye bread made with whole grains and seeds.\"}"
The function is the place to describe the function. The names also should be instructive.