Search for item with specific URL

I’m looking for a specific URL for a bookmark and the phrase devonthink in this example matches multiple URLs / bookmarks. My use case is I’m using this in an iOS Shortcut that updates an item (bookmark) if it already exists or creates a new item if it doesn’t exist.

I’m not sure if I understand? The URL is in the metadata - as it is a bookmark, the URL is not anywhere in the content.