List subcomponents of a component.
AI agents call ros2_medkit_component_subcomponents to retrieve information from Ros2 Medkit 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 information about the hierarchical structure of ROS 2 components (their subcomponents). It performs a read-only lookup with no side effects, matching the Read category definition. Severity is low because the blast radius of misuse is minimal — an attacker gains only informational access to component topology, not control or modification capabilities.
From the tool's definition Tool name contains 'list' and description states 'List subcomponents of a component' — a pure retrieval operation with no modification, deletion, or execution of code/operations.
Documented attack patterns abuse exactly the kind of access ros2_medkit_component_subcomponents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ros2 Medkit, and nothing reaches the server without passing your rules. This is the rule we recommend for ros2_medkit_component_subcomponents:
{
"version": "1",
"default": "deny",
"tools": {
"ros2_medkit_component_subcomponents": {}
}
}ros2_medkit_component_subcomponents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List subcomponents of a component. It is categorised as a Read tool in the Ros2 Medkit MCP Server, which means it retrieves data without modifying state.
Register the Ros2 Medkit MCP server in PolicyLayer and add a rule for ros2_medkit_component_subcomponents: 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 Ros2 Medkit. Nothing to install.
ros2_medkit_component_subcomponents 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 ros2_medkit_component_subcomponents 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 ros2_medkit_component_subcomponents. 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.
ros2_medkit_component_subcomponents is provided by the Ros2 Medkit MCP server (selfpatch/ros2_medkit_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ros2 Medkit, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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84 Ros2 Medkit tools catalogued and risk-classified — across an index of 43,000+ MCP servers.