blender_download_file · ClaudeKit Blender MCP: Risk & Policy

WHAT IT DOES

What blender_download_file does on ClaudeKit Blender MCP

AI agents use blender_download_file 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_download_file needs a policy

This tool fetches data from an arbitrary external URL and writes it to the local filesystem. The Write category applies because it creates new files on disk. Severity is high because an AI agent could be directed to download malicious payloads, exfiltrate-triggering content, or overwrite existing project files via path traversal in destination_path.

From the tool's definition Download file from URL and save to Blender project directory. Supports downloading assets, textures, and reference materials from external sources.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

blender_download_file Rate-limited

blender_download_file 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_download_file": {
      "limits": [
        {
          "counter": "blender_download_file_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_download_file

What does the blender_download_file tool do? +

Download file from URL and save to Blender project directory. Supports downloading assets, textures, and reference materials from external sources. Args: - url (string): URL to download from - destination_path (string): Destination file path (relative to project) - timeout (number, default 30000): Download timeout in milliseconds Returns: Download confirmation with file size, type, and save location Examples: - Download texture: url=. 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_download_file? +

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

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

Can I rate-limit blender_download_file? +

Yes. Add a rate_limit block to the blender_download_file 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_download_file completely? +

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

blender_download_file 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.