download_polyhaven_asset

THE RISK

Medium Risk

Why download_polyhaven_asset needs a policy

Based on the tool name and server context, this tool downloads assets from PolyHaven into the Blender scene. Downloading and importing an asset is a Write operation (creating/adding data to the scene). The description is empty, reducing confidence. It could also be Execute if it triggers a pipeline, but Write is the most likely classification for a download/import action.

From the tool's definition Tool name: download_polyhaven_asset; description is empty. Server description mentions 'asset downloads from PolyHaven'.

Documented attack patterns abuse exactly the kind of access download_polyhaven_asset gives an agent:

POLICY

How to control download_polyhaven_asset

PolicyLayer is an MCP gateway — it sits between your AI agents and Blender MCP for Antigravity, and nothing reaches the server without passing your rules. This is the rule we recommend for download_polyhaven_asset:

policy.json

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

download_polyhaven_asset 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.

Create a free account and register Blender MCP for Antigravity — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Blender MCP for Antigravity tools

Execute execute_blender_code Execute arbitrary Python code in Blender. Make sure to do it step-by-step by breaking it i Execute download_sketchfab_model Download and import a Sketchfab model by its UID. Execute generate_hunyuan3d_model generate_hunyuan3d_model Execute generate_hyper3d_model_via_images generate_hyper3d_model_via_images Execute generate_hyper3d_model_via_text generate_hyper3d_model_via_text Write import_generated_asset import_generated_asset Write import_generated_asset_hunyuan Import the asset generated by Hunyuan3D after the generation task is completed. Write set_texture Apply a previously downloaded Polyhaven texture to an object.

All 21 Blender MCP for Antigravity tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about download_polyhaven_asset

What does the download_polyhaven_asset tool do? +

download_polyhaven_asset. It is categorised as a Write tool in the Blender MCP for Antigravity MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on download_polyhaven_asset? +

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

What risk level is download_polyhaven_asset? +

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

Can I rate-limit download_polyhaven_asset? +

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

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

download_polyhaven_asset is provided by the Blender MCP for Antigravity MCP server (kc0ed/blender-mcp-for-antigravity). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Blender MCP for Antigravity tool call.

Start from Blender MCP for Antigravity, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →