How do we know it can't shoot lasers? Or that it won't be able to in the future?

When I finish building my Death Star it will deffo be able to shoot planet killing lasers. However in the meantime I'm making damn sure that I'm not telling anyone about it until I can use it to take over the planet ...and then become the Supreme Ruler of Earth.
(If you want to live after I take over the world then you'll forget what I just wrote. UNDERSTAND?)