What I was taught: announce 'bet' or 'raise' if a player bets or raises without verbalizing an amount or repeat what the player verbalized if they said an amount/correct it if the amount is invalid. If action has moved fast enough don't say boo. Note: 99% of my dealing over almost 20 years was LHE and high-only LIMIT Omaha.
For donkaments there was no official policy (that anyone could find - our rulebook for poker is what it was 20 years ago + 20 years worth of memos. You would need to hire KPMG or someone like that to audit it and get a concrete answer). If the bet/raise was very obvious most dealers announced it. If the player facing the bet seemed to be taking more time than needed, announcing the bet/raise or breaking it down and announcing the total were likely to happen.
In bigger tournaments there was generally a lot less announcing of bet/raise amounts and breakdowns without asking by the dealer. The expectations of players has changed A LOT on this over time. 10-15 years ago most players got pissed off if you did it. Now most players expect it and actually complain about dealers who are orders of magnitude better in every other aspect but are old school about this.
At a self dealt tournament if that's the only thing they complained about I hear there are openings in the SW if you're interested in a job.