Australian-British academic Kylie Moore-Gilbert’s release from an Iranian prison after more than two years’ detention is certainly a welcome development. However, the circumstances raise some uncomfortable questions for Australian and Western diplomats related to Iran’s penchant for using hostage-taking as a bargaining chip for the release of its own citizens detained abroad for suspected or proven crimes, including terrorism.

Kylie Moore-Gilbert has been released. But will a prisoner swap with Australia encourage more hostage-taking by Iran?