Where can I find a tag list?

You know how you can put [signet] in your post? Where is a list of those? I like using them.

Either wiki, Skills.

Any skill you like inside square brackets - simple as that.

I knew that much. When I type in "Peace and Harmony" with brackets and no spaces it doesn't appear as a skill icon, but now typed exactly like Wiki it does work. I was kind of confused at first. Monster skills do not work with the tagging system though, was that on purpose since it's not necessary?

it's not really necesarry
tags here are mostly meant to show builds (or individual skills to use in builds)
and players can't use monster skills, so there's no real need for them