Unable to get the correct build agent url via XMLRPC

Tried to build the same project twice using two different build definitions.

Project A with Build Def A is building in Agent A
Project A with Build Def B is building in Agent B

I want to get the url of Agent B where Project A with Build Def B is building, but it seems I'm always getting the url of Agent A.

Currently in XMLRPC API we have the getBuildAgentUrl( int projectId ) which should include the build definition id as well to get the correct build agent.