Every constituent should know the team's services and how to interact with it long before needing them, including the limits of what the team will do; whatever the type of team, publishing its policies and procedures to its constituency is mandatory, in a form suited to that constituency (internal operations need not be public). Publication on the team's own information server is recommended, and because a description can be retrieved from anywhere, the team should protect it with a digital signature so users can check it is authentic and untampered.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.