There are no attributes associated with the context_criteria element. But, there is a filterconfig subelement that determines which notifications utilize the tool. In the ics-config.dtd, the element is defined as:

<!ELEMENT context_criteria (filterconfig?)>

For example, there is a server tool called Action1 that executes a program called with a timeout value of 60 seconds, with a display output. To make sure that the tool is enabled in the popup menu for Router notifications, the syntax is:

<actionconfig name="Action1" type="Server" enable="True" timestamp="0">
 <display display_value="True" /diplay>
  <filterconfig type="Expression">
   <criterion attribute="ClassName">Router</criterion>