List face definitions. Faces are visual representations (images, 3D models, web views) attached to templates.
AI agents call dual_list_faces to retrieve information from DUAL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing face definition data without creating, modifying, deleting, or executing anything. It has minimal blast radius—an AI agent misusing it would only retrieve unwanted metadata about template visuals, with no ability to alter state or trigger external operations.
From the tool's definition Tool name 'dual_list_faces' and description explicitly state it 'List[s] face definitions' — a retrieval operation with no modification or side effects. Faces are metadata (visual representations attached to templates), not executable code or financial assets.
Attacks that exploit this kind of access
List face definitions. Faces are visual representations (images, 3D models, web views) attached to templates. It is categorised as a Read tool in the DUAL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the DUAL MCP Server MCP server in PolicyLayer and add a rule for dual_list_faces: 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 DUAL MCP Server. Nothing to install.
dual_list_faces 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 dual_list_faces 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 dual_list_faces. 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.
dual_list_faces is provided by the DUAL MCP Server MCP server (ro-ro-b/dual-mcp-server). 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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