set_principled_bsdf

Full control over Principled BSDF PBR shader. Only set the parameters you need.

SERVERBlender Copilot MCP Server SOURCEdwgx/blender-copilot

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/dwgx-blender-copilot/set-principled-bsdf.md

WHAT IT DOES

What set_principled_bsdf does on Blender Copilot MCP Server

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

RISK

Why set_principled_bsdf is rated Medium

This tool creates or modifies shader material data. Changes to PBR parameters (base color, roughness, metallic, etc.) are reversible—users can undo, re-assign shaders, or adjust parameters again. It does not delete data, execute code, or trigger external operations. The 'set' verb and material-editing scope place it in Write rather than Execute.

From the tool's definition Tool modifies Principled BSDF shader parameters via 'set' operation. Description states 'Full control over...shader' parameters, indicating reversible material property changes in Blender's non-destructive workflow.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_principled_bsdf safely

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

set_principled_bsdf Rate-limited

set_principled_bsdf 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": {
    "set_principled_bsdf": {
      "limits": [
        {
          "counter": "set_principled_bsdf_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 Blender Copilot MCP Server, apply this rule, and every set_principled_bsdf call is checked against it from then on.

FAQ

Questions about set_principled_bsdf

What does the set_principled_bsdf tool do? +

Full control over Principled BSDF PBR shader. Only set the parameters you need. It is categorised as a Write tool in the Blender Copilot MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_principled_bsdf? +

Register the Blender Copilot MCP Server MCP server in PolicyLayer and add a rule for set_principled_bsdf: 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 Blender Copilot MCP Server. Nothing to install.

What risk level is set_principled_bsdf? +

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

Can I rate-limit set_principled_bsdf? +

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

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

set_principled_bsdf is provided by the Blender Copilot MCP Server MCP server (dwgx/blender-copilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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