Well. Google keyword tool is always works after login with gmail account because its will detect geo-graphic location by which google tool can give accurate results.
But If you would like to change the location then you can select the Country > Language >Devices from "Advanced Options and Filters".
Its will sure give you accurate Global Search Volume and local Search Volume (Monthly)
- Even Google keyword tool also gives CPC value which will give you exact value of a keyword.

Hope so you like this tips.

Thank you !