Google-Agent Agent

Acts for a person. Operated by google.

Identity: Signs its requests (Web Bot Auth).

How to recognise it

Signed requests: Signature-Agent from agent.bot.goog, keys at https://agent.bot.goog/.well-known/http-message-signatures-directory
Published IP list: https://developers.google.com/static/crawling/ipranges/user-triggered-agents.json
Reverse DNS ends in googlebot.com, google.com, googleusercontent.com (then forward-confirm)
User agent contains Google-Agent

With Double Agent

Sessions from Google-Agent are labelled agent with agent_id: google.google-agent, and tagged in your analytics. Nothing is blocked unless you choose to. Install: https://doubleagent.so/install.md

Source: https://developers.google.com/crawling/docs/crawlers-fetchers/google-user-triggered-fetchers · Operator docs: https://developers.google.com/crawling/docs/crawlers-fetchers/google-user-triggered-fetchers