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Playwright Tools for MCP - A Model Context Protocol server that provides browser automation capabilities using Playwright
Playwright MCP has 36 well-named tools with consistent verb_noun patterns (browser_navigate, browser_click, etc.). All tools have descriptions (10-100 chars, mostly adequate). Input schemas are present and typed for all tools. However, descriptions are often terse (e.g., 'Navigate to a URL in the browser' is 34 chars, below the 50-200 char LLM-optimized baseline). Parameter descriptions are minimal or absent in many cases, e.g., browser_scroll lacks detail on scroll behavior, browser_evaluate lacks warnings about JS injection risks. Output schemas are not documented in the visible code. Error handling guidance is absent, tools do not indicate what to do on failure (retry? ask user?). No pagination support visible for list operations. Security concerns: browser_evaluate accepts arbitrary JS code without sanitization warnings.
Capture a snapshot of the current page
Check a checkbox element
Click on an element in the page
Close a browser tab
Log a message to the browser console
Accept a dialog (alert, confirm, prompt)
Dismiss a dialog (alert, confirm, prompt)
Evaluate JavaScript code in the page context
Upload a file through a file chooser dialog
Descriptions are terse (avg 34-55 chars, well below 50-200 char LLM-optimized baseline). Examples: 'Go back to the previous page in browser history' (50 chars), 'Check a checkbox element' (24 chars). LLMs need richer context to select tools correctly.
No output schemas documented. Tools return results but LLMs cannot infer what fields to expect (e.g., does browser_list_tabs return tab IDs, titles, URLs?). This forces agents to guess and risks failed downstream tool calls.
browser_evaluate accepts arbitrary JavaScript code without sanitization warnings or injection risk guidance. Description lacks security context. Agents could be tricked into executing malicious code.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 53 | 2026-07-28+ | v2 |
Fill a text input field
Focus on an element
Generate a PDF from the current page
Get the text content of the current page
Get the title of the current page
Get the URL of the current page
Go back to the previous page in browser history
Go forward to the next page in browser history
Hover over an element
Install a browser
Press and hold a keyboard key
Press a keyboard key
Type text using the keyboard
Release a held keyboard key
List all open browser tabs
Navigate to a URL in the browser
Intercept network requests
Open a new browser tab
Reload the current page
Take a screenshot of the current page
Scroll the page
Scroll an element into view
Select an option from a select element
Select a specific browser tab by index
Uncheck a checkbox element
Wait for a navigation event
Wait for a specified amount of time
No error handling guidance. Tools do not indicate what to do on failure (retry? ask user? fatal?). Example: browser_navigate fails silently, is it a network error (retry) or invalid URL (user-fixable)?
Parameter descriptions are minimal or absent. Example: browser_scroll 'direction' param lacks enum constraint (up/down/left/right assumed but not declared). browser_keyboard_press 'key' param lacks format guidance (key names, modifiers).