rhino_mesh_from_brep

What rhino_mesh_from_brep does on Rhino

AI agents use rhino_mesh_from_brep 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.

Why rhino_mesh_from_brep is rated Medium

The tool creates or generates new mesh geometry from existing Brep objects. While reversible (the original Brep remains and the mesh can be deleted), this is a Write operation as it produces new data objects in the Rhino model. Severity is medium because misuse could clutter or corrupt a user's model with unwanted geometry, but the operation is reversible and doesn't execute arbitrary code or delete data.

From the tool's definition Tool description states 'Mesh a Brep' which creates a new mesh geometry object from a Brep (boundary representation) solid. This is a creation operation that generates new geometric data in Rhino.

The rule that runs rhino_mesh_from_brep 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_mesh_from_brep, this is the rule to start with:

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

Questions about rhino_mesh_from_brep