The “Blocked by Page Removal Tool' message in Google Search Console refers to pages or URLs that have been removed from Google's search index, usually due to a valid copyright infringement notice submitted by a copyright owner to exercise their legal Digital Millennium Copyright Act (DMCA) takedown rights.
When a copyright holder discovers their copyrighted content has been reproduced without authorization on a web page, they can submit a DMCA takedown notice to request that Google remove that page from search results. If Google accepts the complaint as valid after review, the infringing URLs will be deindexed and labeled as “Blocked by Page Removal Tool” in Search Console.
Site owners will see this message if they try to request indexing for a URL that contains copyrighted content copied illegally from another website. The message means that page cannot be indexed in Google again until the copyrighted content is removed from it, or until the requesting party files a valid DMCA counter-notice challenging the complaint if they believe it was submitted in error.
In summary, the “Page Removal Tool” takedown message indicates the URL has copied copyrighted content and has been removed from Google's search results per a DMCA notice and takedown request. The page cannot be reindexed legally until copyright issues are resolved.