I had a situation last week where my DM and I completely disagreed how the following situation should have been ruled:
I'm a Circle of the Moon druid wild-shaped into a Giant toad and I had swallowed a mage. The Swallow attack description says
"(...) The swallowed target is blinded and restrained, it has total cover against attacks and other effects outside the toad, (...)" (Giant toad, MM.)
But on the mage's turn he was able to cast Fireball at a point of his choice outside the Giant Toad, because Fireball's bright streak came from the Giant Toad's belly, exited the mouth, and struck a point outside the toad.
In broad terms, can a blinded caster choose a point outside of the Toad? And can a caster with total cover (in this case) target a point outside of the Giant Toad?
I've read the rules, especially regarding total cover and in fact it doesn't say anything about a person with total cover attacking someone who couldn't attack him because the cover. I would like to know if really it is possible for it to happen by RAW or RAI, because for me in this case total cover for those inside the Toad implies anyone outside it also has total cover, and vice versa.