A statement about a constraint on application of agent. Applied at point of use of service. Another cut on notion of domain is as a computational vehicle and agent pre-agreeing to policies. Policy verification is a membership test. Similar to client server relationship in an agent-service relationship.
Policies are related to services.
Lots of discussion in FIPA on content languages. Requirements on them, policies on them. Do you allow multiple representations of content languages. Provides a good way for objects and agents to interoperate in the same environment. Another way to do this is via a content language that is oo.