Whether this player may open the line's shared inbox right now (MICA-307): a line
mica_job_lines declares, and the player is its staff. Presentation only; every inbox
action re-checks it on the server.
The script's label, or the number itself when it gave none.
A phone number a script registered under a job (MICA-227's
RegisterNumber({ job, label })), as the Jobs app lists it: a name and something to dial, nothing a player can edit.