For example, if someone posts a picture of a tool or a piece of wood, how should that be handled?
I think I recall some SE sites discouraging identification questions as too localized because they end up being only useful to the asker and are phrased in terms of, "What is this?" which doesn't help with searching.
If we allow identification questions, should each one be tagged with the answer and/or should the title be edited afterward to reflect the answer?
What kind of wood is this? <picture> tags: wood
What kind of wood is this? [antarctic spruce] <picture> tags: wood, wood-identification, antarctic-spruce