Why it matters

Web browsing enables research + task automation agents. Understanding shapes browser tool safety.

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The architecture

Headless browser: Playwright or Selenium in Docker.

Tool wraps navigation + extraction.

Browser tool architectureHeadless browserPlaywright/SeleniumNavigate + extractURL → contentSandbox networkrestrict accessSandbox critical: browser has broad capability; SSRF + malicious sites
Browser tool components.
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How it works end to end

Sandbox: isolated container, restricted network (block internal IPs, cloud metadata).

Content extraction: HTML → text via Readability.

Cookies: per-user isolation.

Rate limits + content policy.