The Tok'ra Sentry were vigilant warriors who would watch out for any avenue of attack on their secret bases. Due to the limited number of Tok'ra, these sentries would make use of technological means to add to their effectiveness for their task.
These sentries were the first to arrive on a new planet that would serve as the Tok'ra homeworld where they would secure the location until the underground tunnels were formed. They were also the last to leave the site, carrying away the last vital equipment and supplies under the strictest of time constraints. (RPG: "Friends and Foes: Stargate Season Two")