List available ROS interfaces
AI agents call list_interfaces to retrieve information from ROS 2 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs introspection of a ROS 2 system by listing available interfaces (topics, services, actions). It is purely informational with no side effects, matching the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch).' The blast radius of misuse is minimal since listing interfaces cannot corrupt, delete, or trigger unintended operations on the ROS 2 system.
From the tool's definition Tool name 'list_interfaces' and description 'List available ROS interfaces' indicate a query operation that retrieves and enumerates available ROS interfaces without modifying any state or executing operations.
Attacks that exploit this kind of access
List available ROS interfaces. It is categorised as a Read tool in the ROS 2 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ROS 2 MCP Server MCP server in PolicyLayer and add a rule for list_interfaces: 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 ROS 2 MCP Server. Nothing to install.
list_interfaces 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 list_interfaces 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 list_interfaces. 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.
list_interfaces is provided by the ROS 2 MCP Server MCP server (ranch-hand-robotics/rde-mcp-ros-2). 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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