This text field gives the human-readable description that accompanies the remote-invocation error code recorded for the FSM running on the physical-port object that tracks a fabric-interconnect port's configuration mode and the progress of its own discovery workflow. An administrator relies on fsmRmtInvErrDescr to understand a failed step on this Phys instance without having to look up what a bare numeric error code means. For example, fsmRmtInvErrDescr might explain that a remote call to a peer component timed out, immediately telling the operator to check connectivity rather than local configuration.