Nope. You missed a bit of the databook entry because it also says "実体を持たぬ"霊器"の盾。全ての"性質変化"を有し、受けた攻撃の属性に応じて自身の属性を変え、術を無効化する。Which translates as "the incorporeal shield of the "Sacred Treasures". Endowed with all nature transformations, it can change its own characteristics depending on the characteristics of the attack it receives, making the technique ineffective."Now that is just wrong, as the Data-book states itself. The Mirror works by altering its own attributes to match that of the attack's, leaving it inefficient.
That's its true power. The rest is just hyperbole because had it lived up to that hyperbole, there wouldn't have been a scratch on Itachi when Kirin hit but as it turns out, his cloak was destroyed and his body badly damaged.