Yeah. Basically it's Oxygen and other compounds usually created by life. But there is not a 100% "It's life" test, because those chemicals can also be created by other non-organic methods. The combination of detected "signs of life" would be a strong candidate, but never a certainty. Then scientists will spend next 50 or so years looking at the planet and doing more tests and maybe one day manifest "yeah, it's probably life." It's gonna be slow burn.