blender_create_primitive · ClaudeKit Blender MCP

WHAT IT DOES

What blender_create_primitive does on ClaudeKit Blender MCP

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

WHY IT NEEDS A POLICY

Why blender_create_primitive needs a policy

This tool creates new scene objects (primitives like cubes, spheres, etc.) but does not execute arbitrary code, delete data, or cause irreversible effects. Object creation in a 3D modeling context is a standard Write operation—it modifies scene state reversibly since created primitives can be undone or deleted.

From the tool's definition Tool creates a basic 3D primitive object in Blender scene at a specified location with optional custom name and scale. The description explicitly states it 'Create[s]' a mesh primitive, which is a reversible data modification operation within the 3D scene.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

blender_create_primitive Rate-limited

blender_create_primitive 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": {
    "blender_create_primitive": {
      "limits": [
        {
          "counter": "blender_create_primitive_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches ClaudeKit Blender MCP, so you can run agents against it safely.

FAQ

Questions about blender_create_primitive

What does the blender_create_primitive tool do? +

Create basic 3D primitive object in Blender scene. Creates mesh primitive at specified location with optional custom name and scale. Args: - primitive_type:. It is categorised as a Write tool in the ClaudeKit Blender MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on blender_create_primitive? +

Register the ClaudeKit Blender MCP server in PolicyLayer and add a rule for blender_create_primitive: 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 ClaudeKit Blender MCP. Nothing to install.

What risk level is blender_create_primitive? +

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

Can I rate-limit blender_create_primitive? +

Yes. Add a rate_limit block to the blender_create_primitive 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 blender_create_primitive completely? +

Set action: deny in the PolicyLayer policy for blender_create_primitive. 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 blender_create_primitive? +

blender_create_primitive is provided by the ClaudeKit Blender MCP server (olbboy/claudekit-blender-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.