TwoSix
Everyone's literal second-favorite poster
Maybe not in your D&D games. I've been doing that for a long time.It's the GM's choice to agree with the player and then author that fiction. It's not the player's choice to author it, and it's not baked into a dice roll mechanic the players use.
How else am I supposed to know if there's a cleric in the town? I certainly don't bother to do that prep ahead of time.