Guild Wars 2

When harvesting plants it should say what tier sickle it requires to harvest it, because the large variety of plant nodes makes it difficult to remember which sickle gathers what, and looking it up by reading the description of the sickle can take a long time if you don’t pick the correct one first.
Metal nodes are simple and don’t need it, though the case is somewhat arguable for trees as well.

I personally don’t have an issue with this since I only use Mithril gathering tools and switch to Orichalcum when mining orich and ancient, so it’s not much for me to keep track of. I can imagine it is frustrating for those who do swap them out all the time. An idea of how to make it easier for people could maybe change the color of node text to red when you don’t have the right level equipped that would be easily noticeable, although I don’t know if that would be hard to add in.