Using Policy Agent with Sun Access Manager

Hi,

I’m trying to use a Web Agent to protect a web application deployed on a WebMethods portal. When I look at the agents located on this page :

http://www.sun.com/download/index.jsp?cat=Identity%20Management&tab=3&subcat=Access%20Manager

there’s nothing for webmethods. So what is the alternative/workaround? Is it directly in the Sun Acces Manager? Thanks