Get accessibility tree snapshot of the current page (token-efficient alternative to full DOM). Uses Playwright
AI agents call get_accessibility_snapshot to retrieve information from Playwright MCP HTTP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves accessibility metadata from the current browser page state without performing any actions, modifications, deletions, or external operations. It is purely informational and has no side effects. Classified as Read with low severity because misuse would only expose page structure information already loaded in the browser session.
From the tool's definition Tool name 'get_accessibility_snapshot' and description 'Get accessibility tree snapshot of the current page' indicate a read-only operation that retrieves page structure without modifying state.
Attacks that exploit this kind of access
Get accessibility tree snapshot of the current page (token-efficient alternative to full DOM). Uses Playwright. It is categorised as a Read tool in the Playwright MCP HTTP Server MCP Server, which means it retrieves data without modifying state.
Register the Playwright MCP HTTP Server MCP server in PolicyLayer and add a rule for get_accessibility_snapshot: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Playwright MCP HTTP Server. Nothing to install.
get_accessibility_snapshot is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_accessibility_snapshot rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_accessibility_snapshot. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_accessibility_snapshot is provided by the Playwright MCP HTTP Server MCP server (mcpmessenger/playwright-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →