There are four levels of information
available from the browser function
low
<xt:browser detail="1" />
Mozilla

medium
<xt:browser detail="2" />
Mozilla/5.0

high
<xt:browser detail="3" />
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

icon
<xt:browser detail="4" />