What does 'set breadcrumb' do in Rules? One of the actions that comes with the Rules module is 'set breadcrumb'.



When trigger this action, however, nothing seems to happen to the breadcrumb.

What is supposed to happen? Does it set the breadcrumb on the page that the user was on when it was triggered, or on the page whose path is used in the action? Why isn't it doing anything, or is it doing something, and if so, what is it doing?
To use the "Set breadcrumb" rules action you should add it to the event "Content is viewed", for example


Event: Content is viewed
Condition: Content is of type article
Action: Set breadcrumb: Title: Articles\n[node:title] Paths: articles\n[node:url]


rules_action_breadcrumb_set basically goes through those title and path values and uses drupal_set_breadcrumb to set the breadcrumb.