Looks like parameters saved using setParameters() become available via subsequent getParameters() call, however, the old parameters are use to invoke the next method in the chain.

org.jboss.jsr299.tck.interceptors.tests.invocationContext.InvocationContextTest.testMethodParameters()
org.jboss.jsr299.tck.interceptors.tests.invocationContext.InvocationContextTest.testIllegalNumberOfParameters()
org.jboss.jsr299.tck.interceptors.tests.invocationContext.InvocationContextTest.testIllegalTypeOfParameters()