blender_set_material_property · ClaudeKit Blender MCP

WHAT IT DOES

What blender_set_material_property does on ClaudeKit Blender MCP

AI agents use blender_set_material_property 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_set_material_property needs a policy

This tool creates or modifies data (material properties) reversibly. It does not execute arbitrary code, delete data, or move money. While it operates within a 3D graphics context via Blender, the operation itself is a write/update action. Severity is medium because misuse could modify a scene's visual appearance but changes are easily undone in Blender.

From the tool's definition Tool description states it 'Modify[s] specific property of existing material' and 'Updates PBR material properties like color, metallic, roughness, or emission.' This is a reversible modification of material data within a Blender scene.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

blender_set_material_property Rate-limited

blender_set_material_property 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_set_material_property": {
      "limits": [
        {
          "counter": "blender_set_material_property_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_set_material_property

What does the blender_set_material_property tool do? +

Modify specific property of existing material. Updates PBR material properties like color, metallic, roughness, or emission. Args: - material_name (string): Material to modify - property:. 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_set_material_property? +

Register the ClaudeKit Blender MCP server in PolicyLayer and add a rule for blender_set_material_property: 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_set_material_property? +

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

Can I rate-limit blender_set_material_property? +

Yes. Add a rate_limit block to the blender_set_material_property 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_set_material_property completely? +

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

blender_set_material_property 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.