AI agents call list_layers 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.
This tool performs a read-only query operation that retrieves metadata about existing layers. It does not create, modify, delete, or execute any operations — it simply enumerates information. Even in a 3D modeling context with full CAD control, listing layers poses minimal risk as it returns structural information without altering the document state.
From the tool's definition Tool is 'list_layers' with description 'List all layers in the Rhino document' — retrieves/queries layer information with no side effects.
Documented attack patterns abuse exactly the kind of access list_layers 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_layers:
{
"version": "1",
"default": "deny",
"tools": {
"list_layers": {}
}
}list_layers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all layers in the Rhino document. 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_layers: 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_layers 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_layers 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_layers. 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_layers 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.