This read-create SnmpAdminString identifies the endpoint as known by the MGC, and the description notes it may instead be supplied by the agent (i.e., read-only) if the MG and MGC use a mutually agreed naming convention. An admin uses this to ensure the endpoint naming on the gateway matches exactly what the call agent expects when addressing that endpoint in control messages. A naming mismatch between this object and the MGC's own endpoint reference would show up as failed connection requests targeting that endpoint.