Czech Republic Under-21 international striker Kolar scored one and played his part in both of the other goals in the 3-0 victory, while Rangers left-back Smith also put in an assured display.
Any moves are unlikely to develop ahead of Thursday's 5pm loan deadline, with both players returning to their parent clubs. But Jones was impressed with their efforts as he ponders how to bolster his ranks in the summer.
"Both are technically sound and did well," said the Bluebirds boss in the South Wales Echo. "It was well worthwhile seeing them over 90 minutes like this and we will assess them over the rest of the season."
The likes of Darren Purse, Riccy Scimeca, Stephen McPhail, Chris Burke, Peter Whittingham and Quincy Owusu-Abeyie also featured for the Bluebirds in the friendly aimed at raising funds for the cash-strapped Martyrs, who are battling just to finish the season.
Over 2,000 spectators attended the match, with extra funds also raised in various ways, which will provide a more than welcome boost to the club's hopes of survival.