Goals in each half from Jane Ross and Jennifer Beattie sealed the win but the verve and vivacity - so evident in recent matches against Bosnia and the Faroe Islands - was mostly lacking at Fir Park.
Scotland, who remain top of Group Four having won all three matches played, travel to face Poland in Grodzisk Wielkopolski on Thursday.
"It was too slow," said Signeul. "We didn't get any fluency in our game."
"I think we are going to rest. It looked like we were a little bit tired.
"I said at the beginning of the week that I thought in training we looked a little bit tired with it being the end of the season.
"We will rest on Sunday, go to Poland on Monday, and try and get the energy back ahead of Thursday's game.
"Every game we play now will get tougher and tougher, and Poland is going to be the toughest of the four games we play so far."
Signeul, who was appointed Scotland coach in January 2005, has been named on the FIFA shortlist for women's world coach of the year.
She has led Scotland to 20th in the world - a highest-ever ranking - and twice steered guided them to the European Championships play-offs.