Member tools

The browser_toolset_20260801 entry declares 31 member tools; each call's input is exactly the parameters listed here, and tab_id, where optional, defaults to the active tab. Target, CoordinateTarget, and RefTarget are the shapes described in Targets and coordinates. Four members (javascript_exec, file_upload, read_console, and read_network) are disabled by default and appear only when you enable them. The input bounds and output conventions noted in each member's row are stated to Claude, not enforced by the API, so validate inputs (including coordinates against your viewport) and apply the conventions in your executor.

Only screenshot and zoom require an image block in their result, and the four tab-management members (new_tab, list_tabs, switch_tab, and close_tab) return exactly one browser_state block (see Tab management results). Every other member returns a text block: either a short acknowledgment such as Clicked element ref_2. or the member's output. Any result other than a tab-management result may also carry an image block, typically a screenshot taken after the action, so Claude sees the outcome without a separate screenshot call; Batch actions shows where to attach one in a batch. A member tool_result may contain only text, image, and browser_state content blocks.

Navigation and capture

Member	Input	Description
navigate	url, tab_id?	Load an http or https URL, or move through history with "back", "forward", or "reload". Treat a URL without a scheme as https:// and refuse any other scheme with an error result. Return a short acknowledgment, plus a browser_state block when the tab's URL or title changed.
screenshot	tab_id?	Capture the viewport and return an image block.
zoom	region, tab_id?	Return a cropped, upscaled image of region, given as [x0, y0, x1, y1] in viewport pixels, for closer inspection of small text or controls.

Pointer

Member	Input	Description
left_click	target: Target, modifiers?, tab_id?	Left-click a coordinate or a referenced element. modifiers is a chord held during the click, for example, "shift" or "ctrl+shift".
right_click	target: Target, modifiers?, tab_id?	Right-click a coordinate or element.
middle_click	target: Target, modifiers?, tab_id?	Middle-click a coordinate or element.
double_click	target: Target, modifiers?, tab_id?	Double left-click a coordinate or element.
triple_click	target: Target, modifiers?, tab_id?	Triple left-click a coordinate or element, which typically selects a line or paragraph.
hover	target: Target, tab_id?	Move the pointer over a coordinate or element without clicking.
left_click_drag	from: CoordinateTarget, target: CoordinateTarget, tab_id?	Press at from, drag to target, and release.
left_mouse_down	target: CoordinateTarget, tab_id?	Press and hold the left button at a coordinate; pair with left_mouse_up for a custom drag.
left_mouse_up	target: CoordinateTarget, tab_id?	Release the left button at a coordinate.
mouse_move	target: CoordinateTarget, tab_id?	Move the pointer to a coordinate.
scroll	target: CoordinateTarget, scroll_direction, scroll_amount?, tab_id?	Scroll at a viewport position. scroll_direction is "up", "down", "left", or "right"; scroll_amount is in scroll-wheel notches, 1 to 10, default 3.
scroll_to	target: RefTarget, tab_id?	Scroll a referenced element into view.

Keyboard and timing

Member	Input	Description
type	text, tab_id?	Type a literal string at the current focus.
key	text, repeat?, tab_id?	Press a key or chord. text is a single key ("Enter"), a chord joined with + ("ctrl+a"), or a space-separated sequence ("Backspace Backspace"); repeat is 1 to 100, default 1.
hold_key	text, duration, tab_id?	Hold a key or chord for duration seconds, 0 to 30.
wait	duration, tab_id?	Pause for duration seconds, 0 to 30.

Page reading

Member	Input	Description
read_page	filter?, depth?, ref?, tab_id?	Return the page's accessibility tree as text with each element tagged with a reference such as [ref_2]. With filter omitted, return every visible element; with "interactive", only visible interactive elements; with "all", also elements outside the viewport. depth caps the tree depth (minimum 1, default 15) and ref scopes the read to that element's subtree. Cap the output at 50,000 characters and say so in the text; Claude then narrows with a smaller depth or a ref.
find	query, tab_id?	Search for elements matching a natural-language description such as "search field" or "add to cart button", and return up to 20 matches in the same tagged format as read_page.
get_page_text	tab_id?	Return the page's visible text as plain text, prioritizing the main article content; suited to articles, documentation, and other text-heavy pages.

Forms and files

Member	Input	Description
form_input	target: RefTarget, value, tab_id?	Set a form element's value directly. value is a string, number, or boolean; use a boolean for checkboxes and an option's value or visible text for selects.
file_upload (disabled by default)	target: RefTarget, paths?, document_ids?, tab_id?	Set the files on a file-input element from paths on the executor's filesystem, document_ids your application has staged, or both; at least one is required. See Upload files.

Diagnostics and scripting

Member	Input	Description
read_console (disabled by default)	tab_id?	Return the tab's console entries (log, warning, and error lines) accumulated since the last read, one line per entry. See Read console and network activity.
read_network (disabled by default)	tab_id?	Return the tab's network requests (method, URL, status, MIME type, timing) since the last read, one line per entry.
javascript_exec (disabled by default)	text, tab_id?	Run text as JavaScript in the page context and return the value of the last expression as text. See Enable optional members.

Tab management

Member	Input	Description
new_tab	(none)	Open a tab and make it the active tab.
list_tabs	(none)	Report the tab inventory.
switch_tab	tab_id (required)	Make tab_id the active tab.
close_tab	tab_id (required)	Close tab_id.

On success, each of these returns exactly one browser_state block and no text or image; see Tab management results.