Assessment tools used in pre-employment screening and development assessment must be shown as valid for whatever they purport to measure. Any test publisher should be able to provide documentation that the instrument being used was developed, designed, and shown to be relevant for the advertised purpose.
Not all assessments can be used for all purposes. For example, the Myers-Briggs Type Indicator is a popular development assessment, but the publisher will not validate its use as a pre-hire assessment tool, because it was not created for that purpose.