// builtin tools · 02
Browser builtin
browse reads pages and, with the browser extra, can click, fill and screenshot through Playwright. Without Playwright it degrades to read-only fetch.
| mode | behavior |
|---|---|
| without browser extra | urllib fetches the page, strips HTML and returns text |
| with Playwright | opens Chromium and supports click, fill and screenshot |
params url required Public URL to open. action read|click|fill|screenshot Requested action; default read. selector string CSS selector for click/fill. text string Text used by fill. screenshot path Output path for screenshots.
Network guard
Every URL passes through public-URL validation before fetch/browser navigation, reducing SSRF and prompt-injection exfiltration.