Even if you cannot bring another KF drive near, it's not too difficult to starve a JumpShip to death. They have surprisingly short legs, the consumables bottleneck apparently being fuel for their station keeping drive. If no supply DropShips - particularly tankers - can get near, there's nothing they can do. And unlike a planet, a JumpShip is reasonably easy to blockade.
In fiction, shooting up the jump sail (or even just threatening to) will usually make a JumpShip surrender. Without a jump sail they'd have to charge via reactor and that gobbles up even more of the precious station keeping fuel.