Playwright MCP is an automation server.
The official Playwright MCP project gives an MCP client browser-oriented tools for navigation, inspection, interaction, and testing. The client asks the server to operate a browser; the page is not automatically exposing its own MCP contract.
That makes Playwright useful for sites that do not provide structured tools, but it also means the route depends on selectors, page state, authentication, timing, and the consequences of clicks. Treat browser actions as side effects that need the same approval and recovery discipline as API calls.
Configure the smallest safe session.
Start with a test environment or isolated browser profile. Define the URL scope, storage state, credentials, downloads, pop-ups, and allowed actions before asking an agent to navigate. Do not load a personal session into a server or test account that can reach production billing, customer records, or irreversible actions.
Keep the client configuration reproducible and pin the package or version used for the test. Browser automation behavior can change when Playwright, the browser, a website, or a locator changes.
Verify the browser result, not just the command.
A successful click is not the same as a successful business outcome. Capture the page, URL, visible confirmation, network-independent evidence, or resulting record needed to prove that the action happened. Test a missing element, changed page, timeout, authentication redirect, and denied action.
Use read-only checks before write actions. If a form submission or purchase is in scope, show the final values and require a person to approve the irreversible step. The agent should stop when the page state does not match the expected route.
Know when WebMCP is the better abstraction.
WebMCP is an emerging browser-native direction in which a page can expose structured tools to web agents. Playwright MCP is an external automation server that acts on the browser. A site with reliable WebMCP tools may give an agent a clearer interface than pixel or locator-based actuation, while Playwright remains useful for legacy or third-party pages.
Treat WebMCP as evolving and subject to change. Do not use a browser automation article to promise that a page supports WebMCP; check the page, client, and current browser documentation separately.