Very odd. The tool mentioned by @Purplecat above thinks that the first link in surgical instrument is “scalpel.”

Actually, it depends on where you start from. Here it thinks it “hemostat”:

What’s odd is that I can’t find any history of the page “surgical instrument” that contains anything but “surgery” as the first link, as far back as May 2011 which is apparently when this tool was created. So it’s not just a caching question.
Is this tool deliberately avoiding closed loops by picking the next option? That’s a bit unfortunate if true.