WordNet sense 1 (readily reacting to suggestions and influences):

responsive, tractable

WordNet sense 2 ((often followed by `of' or `to') yielding readily to or capable of):

susceptible

WordNet sense 3 (worthy of or requiring responsibility or trust; or held accountable):

responsible

WordNet sense 4 (disposed or willing to comply):

conformable

WordNet sense 5 (disposed or willing to comply):

compliant