What is the meaning of 'munshid' (one who announces) in relation to lost property in Mecca?

Primary text

Abu Ubayd defined 'al-munshid' (the announcer) as the one who makes the announcement of identification, or the seeker. The meaning is that the lost item of Mecca is not permissible except for the one who identifies it, because this ruling specifically sets it apart from other cities. This interpretation supports the view restricting possession.