This is the architecture of the Oracle Enterprise Manager (OEM): an OEM "console" has the ability to send "scripts" for execution on a "remote agent", that is, an individual monitored server. A restricted form of Tcl (version 8.0, as of 2001?) is the language of these scripts.
OEM is built with Oratcl.
Among the technical reasons Oracle might rationally have chosen Tcl for OEM over, for example, Perl:
See also "COMPANY: Oracle".