Generate a comprehensive visual diff report comparing the current UI against all previously compared Figma specs. Shows overall score, per-element results, and prioritized fix list.
AI agents call get_visual_diff_report 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 retrieves and analyzes previously captured UI data and Figma comparisons to produce a report. It performs no mutations, deletions, code execution, or financial operations. The 'generate' verb here means 'produce/return analysis' rather than 'create and persist new state.' The tool reads existing comparison history and visual data to display results, making it firmly a Read category tool with low risk.
From the tool's definition Tool name 'get_visual_diff_report' and description 'Generate a comprehensive visual diff report comparing the current UI against all previously compared Figma specs' indicates retrieval and analysis of comparison data with no side effects.
Attacks that exploit this kind of access
Generate a comprehensive visual diff report comparing the current UI against all previously compared Figma specs. Shows overall score, per-element results, and prioritized fix list. 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_visual_diff_report: 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_visual_diff_report 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_visual_diff_report 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_visual_diff_report. 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_visual_diff_report 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.
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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