Depends on what the brass was shot in and how dirty it is.
Sometimes I only used a "Damp" cloth...not wet, to wipe the brass of all grime.
If it was shot in a pistol and hit the ground/dirt, I usually cleaned it with compressed air then a damp rag.
My revolver brass is usually shot, then put in my pocket or range bag and reloaded...nothing done. ( maybe a shot or two of air)
I hate saving all the brass and sitting down loading for hours..!!!
I do small batches these days, these are mainly plinking/target rounds.
After several reloads they tend to get "scruffy" so I do the tumbler thing.
It's all good as long as you get anything abrasive off the brass so as not to harm ur dies or chamber.
Everyone has their level of cleanliness, this is just the basics you need.
I like my brass to shine as much as the other guy.
TxD