An overgeneralization, but…
Schools get a lot of bogus assessment requests.
(See the Elite College cheating scandal, you have no idea how many requests for honors kids we get to get extra time on the SATs. My last district job before I switched to charter schools. One out of my nine psychologists was funded to solely deal with rich private school assessment requests. Less than 10% qualified.)
If they are asking for one, they likely are very legitimately concerned and want to find out more.
You are not committing to anything other than the assessment and hearing the results.