Fair, and that one is on me: I shipped the chambers this morning with nothing but their names on the buttons. Just pushed a build where each job says what it gives, in the same words the upgrade tree uses.
Brood is ANTS +10%, granary is RETURN +10% (loot from zones you already cleared), infirmary is HEALING +10%, fungus farm is HARVEST +10%. Each button also shows how many of your chambers already do that job, since that is what you actually want to know before adding another. Reload the page to get it.