rhino_subd_to_nurbs

Convert a SubD object to a NURBS polysurface (Brep).

SERVERRhino SOURCEeasehee/rhino-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/easehee-rhino-mcp/rhino-subd-to-nurbs.md

WHAT IT DOES

What rhino_subd_to_nurbs does on Rhino

AI agents use rhino_subd_to_nurbs to create or update resources in Rhino, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Rhino environment.

RISK

Why rhino_subd_to_nurbs is rated Medium

The tool transforms geometry from SubD to NURBS format, which is a modification operation that creates new geometric data. This is reversible (the original SubD could still exist, or the conversion could be undone via undo), so it falls under Write rather than Destructive.

From the tool's definition Tool description states 'Convert a SubD object to a NURBS polysurface (Brep)' — this modifies geometric data by transforming one representation into another. The verb 'convert' indicates creation/modification of geometry.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rhino_subd_to_nurbs safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Rhino, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For rhino_subd_to_nurbs, this is the rule to start with:

rhino_subd_to_nurbs Rate-limited

rhino_subd_to_nurbs 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "rhino_subd_to_nurbs": {
      "limits": [
        {
          "counter": "rhino_subd_to_nurbs_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Rhino, apply this rule, and every rhino_subd_to_nurbs call is checked against it from then on.

FAQ

Questions about rhino_subd_to_nurbs

What does the rhino_subd_to_nurbs tool do? +

Convert a SubD object to a NURBS polysurface (Brep). It is categorised as a Write tool in the Rhino MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rhino_subd_to_nurbs? +

Register the Rhino MCP server in PolicyLayer and add a rule for rhino_subd_to_nurbs: 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 Rhino. Nothing to install.

What risk level is rhino_subd_to_nurbs? +

rhino_subd_to_nurbs is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit rhino_subd_to_nurbs? +

Yes. Add a rate_limit block to the rhino_subd_to_nurbs 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.

How do I block rhino_subd_to_nurbs completely? +

Set action: deny in the PolicyLayer policy for rhino_subd_to_nurbs. 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.

What MCP server provides rhino_subd_to_nurbs? +

rhino_subd_to_nurbs is provided by the Rhino MCP server (easehee/rhino-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Rhino, and thousands of servers like it.

This server

All 245 Rhino tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →