There is the command
tootctl cache clear, but it does not accept any arguments. Does it delete the complete cache? What happens if someone e.g. boosts an image toot whose image was deleted from the cache before. Will the image then be redownloaded from the respective instance? Would the image be redownloaded if I would just look at the toot again, without it being boosted?
Is there a more accurate description of what this command does somewhere?