captures a screenshot of the current page. Prefer using the accessibility://current resource for understanding page content. Use get_element_text, get_element_attribute, or execute_script to verify element state. Only use screenshots when visual layout or styling needs to be verified.
AI agents call take_screenshot to retrieve information from Mcp Selenium without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Taking a screenshot is a read-only operation that retrieves visual information about the current state of a webpage without modifying, executing, or deleting anything. The description emphasizes this is for visual verification only, not for interaction or automation. This poses minimal risk as it cannot alter system state or trigger unintended actions.
From the tool's definition Tool description states it 'captures a screenshot of the current page' and explicitly recommends preferring other methods for understanding content. Screenshots are passive observation with no side effects.
Attacks that exploit this kind of access
captures a screenshot of the current page. Prefer using the accessibility://current resource for understanding page content. Use get_element_text, get_element_attribute, or execute_script to verify element state. Only use screenshots when visual layout or styling needs to be verified. It is categorised as a Read tool in the Mcp Selenium MCP Server, which means it retrieves data without modifying state.
Register the Mcp Selenium MCP server in PolicyLayer and add a rule for take_screenshot: 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 Mcp Selenium. Nothing to install.
take_screenshot 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 take_screenshot 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 take_screenshot. 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.
take_screenshot is provided by the Mcp Selenium MCP server (@angiejones/mcp-selenium). 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.
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