How to add a new tag by filter?

How could I add a new tag through a filter?

I found tm-add-tag and cannot figure out how to achieve it.

This is my current codes

<$button>Add Tag

<$list filter="[tag[Colleague]]">
    <$fieldmangler>
      <$action-sendmessage $message="tm-remove-tag" $param="new-tag"/>
   </$fieldmangler>
</$list>
</$button>

In your code, you’re using “tm-remove-tag” instead of “tm-add-tag”.

Sometimes it’s easier to use the Action Listops Widget.

Thanks. So embarrassing. I copy it from other place and forget to change it.