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. See [1 ] for Oracle's documentation, which claims it is using Tcl 7.5 ...
(the link above is broken - see Oracle Documentation)
OEM is built with Oratcl.
Among the technical reasons Oracle might rationally have chosen Tcl for OEM over, for example, Perl:
See also "Oracle".