Get box model, positioning, flex/grid info, and dimensions for an element
AI agents call get_layout_info to retrieve information from Mcp Browser Lens without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves layout information from a web page's DOM—specifically box model dimensions, positioning properties, and flex/grid configuration. It has no side effects, does not modify data, execute code, delete anything, or trigger external operations. It is a pure read operation consistent with design inspection and debugging tasks mentioned in the server's purpose.
From the tool's definition Tool name 'get_layout_info' and description 'Get box model, positioning, flex/grid info, and dimensions for an element' indicate retrieval of DOM and computed layout data with no modification or execution of code.
Attacks that exploit this kind of access
Get box model, positioning, flex/grid info, and dimensions for an element. It is categorised as a Read tool in the Mcp Browser Lens MCP Server, which means it retrieves data without modifying state.
Register the Mcp Browser Lens MCP server in PolicyLayer and add a rule for get_layout_info: 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 Browser Lens. Nothing to install.
get_layout_info 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_layout_info 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_layout_info. 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_layout_info is provided by the Mcp Browser Lens MCP server (nano-step/mcp-browser-lens). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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