the tomato agents are the ones who allow oven sandwiches to "manifest" tomatos. Even so, "manifestation" is a common misconception. Every oven is connected by a complex mycelial network utilized by several other appliances. You may be familiar with the Sockbeasts which operate in an inverse manner as tomato agents. These sockbeasts are responsible for the steady increase in sock pair separations since 1993.
prior to, the common cause had been negligence. These Sockbeasts (utilizing the same mycelial network) often encounter tomato agents, which lead to skirmishes which can get very messy. A byproduct of this is tomato paste which is enjoyed by many families accross depending on the continent and climate.
Still, there is one faction that utilizes this network. They are colloquially known as tchotchky worms. While not tied to any specific appliance. they utilize the network to create holes in space-time and access objects at the moment of their mishandling. Screws, Guitar picks, keys, dice; these are only some examples of the items they use to build their casings.
Not dissimilar to the Caddisfly Larvae or more commonly the "plaster bagworm" They use these casings as a kind of armor that increases in size over time. Depending on the preferred material, they may be mistaken for "golems", however, they are more comparable to a coward in an armored combat vehicle.