The Uganda Communications Commission (UCC) this week directed all mobile phone providers to "stop" or "block" any text message that might "incite the public," and provided companies a list of key words to watch out for.
"Tunisia," "Egypt", "Mubarak", "Dictator", "Tear gas" and "People Power" all made the list, which was leaked to the media by the country's main opposition coalition.
The list's authenticity was confirmed by the UCC spokesperson, Paul Mwesigwa.
"We advised (telecom companies) to monitor all messages containing these words," Mwesigwa told AFP on Friday.
Top opposition candidate Kizza Besigye has warned that Uganda is ripe for an Egypt-style anti-government uprising, but President Yoweri Museveni, expected to win Friday's vote, ruled out the possibility.
Rounding out the 13-term SMS watchlist are "gun/bullet" and "Ben Ali", a reference to Zine El Abidine Ben Ali, the former Tunisian strongman ousted last month in a popular revolt, like Egypt's Hosni Mubarak.
Mwesigwa admitted however that the UCC "doesn't really have the capacity to screen messages", but, he added, "we hope these private companies do".
Evidence suggests that the screening system is not yet operational, as one AFP journalist on Friday successfully transmitted the following message to a colleague, with both in Kampala: "Egypt. Mubarak. Dictator. Tunisia."