AI agents use create_nurbs_curve to create or update resources in GOLEM-3DMCP-Rhino- — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your GOLEM-3DMCP-Rhino- environment.
Creating NURBS curves is a reversible write operation that modifies the Rhino document by adding new geometry. It does not execute arbitrary code, delete data, or produce financial effects. While the server permits arbitrary Python execution (Execute-class capability), this specific tool is narrowly scoped to geometry creation.
From the tool's definition Tool name 'create_nurbs_curve' indicates creation of geometric data (NURBS curves) in Rhino 8. Server description confirms it provides 'direct, programmatic control of Rhino 8 — create geometry'. The tool description is empty, preventing higher certainty.
Documented attack patterns abuse exactly the kind of access create_nurbs_curve 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 create_nurbs_curve:
{
"version": "1",
"default": "deny",
"tools": {
"create_nurbs_curve": {
"limits": [
{
"counter": "create_nurbs_curve_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_nurbs_curve stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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create_nurbs_curve. It is categorised as a Write tool in the GOLEM-3DMCP-Rhino- MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the GOLEM-3DMCP-Rhino- MCP server in PolicyLayer and add a rule for create_nurbs_curve: 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.
create_nurbs_curve is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_nurbs_curve 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 create_nurbs_curve. 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.
create_nurbs_curve 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.
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89 GOLEM-3DMCP-Rhino- tools catalogued and risk-classified — across an index of 43,000+ MCP servers.