Using keyword volumes contradictions

My developer token was recently rejected due to the reason they do not allow keyword research only tools to use this api, I have found many sites that contradict this statement and must be getting their data from google somewhere along the line, example: https://www.storybase.com/faq/ https://

How do I quantify competition value? 0-1

In the documentation it states that the value of the competition for each keyword result will be a double between 0 and 1, https://developers.google.com/adwords/api/docs/reference/v201809/TargetingIdeaService.TargetingIdeaSelector How do i classify what is low/medium/high competition based on