Comparative law notes
The suggested English term "Office of the General Counsel for the Federal Government" is a neologism, as Advocacia-Geral da União has no full equivalency in other jurisdictions.
It is worth noting that there is a Brazilian regulation (Portaria Normativa AGU No. 4, of March 15, 2021) defining the official English terminology related to AGU's departments and positions. Under this regulation, Advocacia-Geral da União is called Attorney General's Office.