You can use EEM for this. Tcl would not be required:
event manager applet email-on-reload
event timer cron cron-entry @reboot
action 1.0 cli command "enable"
action 2.0 cli command "show ver"
action 3.0 mail from router@company.com to user@company.com server 10.1.1.1 subject "Router reloaded" body "Router reloaded : $_cli_result"