The properties that can be determined from a browser user agent include the operating system, browser name and version, device type or model, rendering engine used, language and region preferences, and a few others, so how can I analyze for these:

Device model
Rendering engine name
Rendering engine version
Language preference
Screen resolution
Color depth
Cookies supported
Referrer website
spam lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor creativity violence