[1.16.5] Loot table that can only be called from command?

Just kinda to clarify because I can't tell if im bein goop brain, if I make an entity type loot table and don't nam the file after a mob, will that loot table only be accessible via the /loot command? I'm trying to make some loot tables that can only be used with functions, which will be called when some modded items are used, but just want to make sure I'm understanding how loot tables work properly lol