Zardnaar
Legend
It depends what you mean by broken. The magic item rarity classifications have been broken since 2014 at least, in that it doesn't correspond to the actual power of the magic item. Which didn't matter so long as it wasn't tied to class abilities and the DM wasn't trying to allocate loot 3rd edition style.
But clearly, single use items are rated as less rare than permanent items, and the rules for artificers fail to call this out when the item in question is not a potion or scroll. Back in Tashas you could bend the rules using the one shot tattoos that worked like scrolls in the same book for example.
In this particular example, if it's not a computer game, having a large number of summons in play is clearly antisocial, slowing the game to a crawl, which is why spells like Conjure Animals were changed. So I can't see any DM allowing this instance of rules-bending. So the game is broken in the sense that it's going to leave the player who tries it butt-hurt.
Even in BG3 to many summons is a PitA. Computer does most of the work.

