The Belavkin version of quantum Cram'{e}r-Rao bound dictates that the covariance of any set of operators is bounded by a product of the derivatives of expectation values and the inverse of quantum metric. We elaborate that because quantum metric itself is the covariance of the generators of translation in the parameter space, quantum metric in any dimension is bounded by a product of itself and Berry curvature. The generator formalism further indicates that the bound is equivalent to a single-observable uncertainty relation for systems described by multiple observables, which in the two-observable case recovers the Robertson-Schr"{o}dinger uncertainty relation. The momentum space quantum metric and spin operators of three-dimensional topological insulators under magnetic field are used to demonstrate the validity of these bounds, and their constraints on the spread of Wannier function, absorbance in 2D, and dielectric function in 3D will be elaborated.