The visitors gained the upper hand after the break, with a disciplined performance and the head coach wants more of the same in the second and final meeting next weekend at Mar del Plata's Estadio Jose Maria Minella.
"The guys worked very hard," he said. "The front row were tremendous. We had to control the scoreboard in the second half.
"I was pretty frustrated first half, but I thought we had a good shape. Everybody worked together in a disciplined fashion.
"The outside backs worked well, we got the ball to the outside channels, the line-out was pleasing, although in one line-out we lost and they scored off it."
Scotland survived a succession of five-metre scrums that could have changed the outcome of the game and Parks's consummate kicking display settled matters.
"There is still a long way for us to go, a lot of improvements," reiterated Robinson. "This is just a start.
"We are very pleased with the result, really pleased with the attitude of the whole squad, but next week's game is going to be very, very tough.
"We have the opportunity to get back-to-back wins in Argentina, which not many teams have done."
Glasgow flanker John Barclay echoed his manager's thoughts, refusing to get carried away by the victory.
There wasn't too much whooping and cheering afterwards because most people know it's just a job half done
"We showed a lot of spirit to come back from conceding two tries but I'm a wee bit disappointed we didn't score a try because we had a lot of opportunities," he told the Scottish Rugby website.
"It would be an outstanding achievement to go home with a series win and, on the flip side, if we don't win, it would leave a bit of a sour taste at the end of the season, so there wasn't too much whooping and cheering afterwards because most people know it's just a job half done."
Man-of-the-match Parks was delighted to be on the winning side but, again, was focusing on the second Test immediately after the victory.
"It's a great feeling," he said. "It's been a pretty slow week. It took a bit of time to warm up for us but now we've got the first game under our belts, we're feeling great and looking forward to the next one.
"We played a lot of good rugby, the guys got their hands on the ball and did really well.
"We've got to do the same again next time and, with a bit of luck, score some tries."
Moray Low, Johnnie Beattie and Sean Lamont all picked up leg injuries during the game and will require attention from the medical team, while skipper Al Kellock needed stitches to a cut lip.
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