Get a visual diff highlighting changes between two screenshots.
AI agents call get_visual_diff to retrieve information from Qontinui MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and analyzes comparison data from two screenshots to highlight changes. This is a query/retrieval operation with no side effects—it does not execute code, modify data, delete resources, or commit financial actions. The visual diff output is informational only.
From the tool's definition Tool performs a comparison operation ('Get a visual diff') between two existing screenshots, returning visual differences without modifying, creating, executing, or deleting any data.
Attacks that exploit this kind of access
Get a visual diff highlighting changes between two screenshots. It is categorised as a Read tool in the Qontinui MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Qontinui MCP Server MCP server in PolicyLayer and add a rule for get_visual_diff: 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 Qontinui MCP Server. Nothing to install.
get_visual_diff 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 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. 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 is provided by the Qontinui MCP Server MCP server (qontinui/qontinui-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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