AI agents call list_grasshopper_components to retrieve information from GOLEM-3DMCP-Rhino- without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to retrieve or enumerate Grasshopper components available in Rhino, which is a Read operation with no side effects. While the empty description reduces confidence slightly, the 'list_' prefix is a strong indicator of a retrieval-only operation.
From the tool's definition Tool name 'list_grasshopper_components' indicates retrieval of component metadata or inventory; 'list' is a classic Read operation pattern.
Documented attack patterns abuse exactly the kind of access list_grasshopper_components gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GOLEM-3DMCP-Rhino-, and nothing reaches the server without passing your rules. This is the rule we recommend for list_grasshopper_components:
{
"version": "1",
"default": "deny",
"tools": {
"list_grasshopper_components": {}
}
}list_grasshopper_components is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
list_grasshopper_components. It is categorised as a Read tool in the GOLEM-3DMCP-Rhino- MCP Server, which means it retrieves data without modifying state.
Register the GOLEM-3DMCP-Rhino- MCP server in PolicyLayer and add a rule for list_grasshopper_components: 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 GOLEM-3DMCP-Rhino-. Nothing to install.
list_grasshopper_components 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_grasshopper_components 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_grasshopper_components. 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_grasshopper_components is provided by the GOLEM-3DMCP-Rhino- MCP server (thekinghippopotamus/golem-3dmcp-rhino-). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from GOLEM-3DMCP-Rhino-, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
89 GOLEM-3DMCP-Rhino- tools catalogued and risk-classified — across an index of 43,000+ MCP servers.