Shows the interface (definition) for a given ROS 2 message or service type.
AI agents call show_ros2_interface to retrieve information from ROS MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays metadata about ROS 2 interfaces (message/service definitions). It is purely informational—reading existing type definitions without creating, modifying, deleting, or executing anything. It does not trigger robot actions, modify configuration, or cause external effects beyond returning data.
From the tool's definition Tool 'shows the interface (definition)' for ROS 2 message or service types—a query/lookup operation with no side effects or modifications to the system.
Documented attack patterns abuse exactly the kind of access show_ros2_interface gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ROS MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for show_ros2_interface:
{
"version": "1",
"default": "deny",
"tools": {
"show_ros2_interface": {}
}
}show_ros2_interface is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Shows the interface (definition) for a given ROS 2 message or service type. It is categorised as a Read tool in the ROS MCP MCP Server, which means it retrieves data without modifying state.
Register the ROS MCP server in PolicyLayer and add a rule for show_ros2_interface: 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 MCP. Nothing to install.
show_ros2_interface 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 show_ros2_interface 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 show_ros2_interface. 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.
show_ros2_interface is provided by the ROS MCP server (yutarop/ros-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 24 ROS MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
24 ROS MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.