I think listing icons outside of their context is a bit too abstract. For example, there’s a wrench icon at the topic level and a wrench icon within a topic because they both configure admin actions on those respective levels.
Are there more specific issues you could address? For example which options have confused you in particular? Do you think some of the buttons at the bottom of a topic are too redundant? (I’m not sure the topic-level wrench there is necessary, for example)
Tags and icons are two very different things here.
Icons are the status of a topic (closed, hidden, solved, pinned, assigned).
Tags are meant to classify contents.