bake_normals · Blender MCP: Risk & Policy

WHAT IT DOES

What bake_normals does on BlenderMCP

AI agents invoke bake_normals to trigger actions in BlenderMCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why bake_normals needs a policy

Baking normals in Blender is a compute-intensive rendering operation that generates/writes normal map textures from 3D geometry. It triggers an external operation within Blender (render baking), which aligns with Execute. It may also overwrite texture data (Write).

From the tool's definition Tool name 'bake_normals' and server context (BlenderMCP executes Python scripts within Blender environment)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bake_normals Rate-limited

bake_normals stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "bake_normals": {
      "limits": [
        {
          "counter": "bake_normals_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about bake_normals

What does the bake_normals tool do? +

bake_normals. It is categorised as a Execute tool in the BlenderMCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on bake_normals? +

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

What risk level is bake_normals? +

bake_normals is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit bake_normals? +

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

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

bake_normals is provided by the Blender MCP server (shirshovdim/retopoflow_blender_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.