AI agents call blender_download as a supporting operation in Blender workflows.
The tool name suggests downloading something (possibly assets, addons, or files into Blender), which could be a Read or Write operation. However, with no description available, the exact behavior is unknown. Downloading could range from simply fetching data (Read) to writing files to disk (Write) or even executing downloaded content (Execute). Given the ambiguity, confidence is low.
From the tool's definition Tool name is 'blender_download' but description is empty or uninformative.
Documented attack patterns abuse exactly the kind of access blender_download gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Blender, and nothing reaches the server without passing your rules. This is the rule we recommend for blender_download:
{
"version": "1",
"default": "deny",
"tools": {
"blender_download": {
"limits": [
{
"counter": "blender_download_rate",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
}
}blender_download gets a rate cap, and everything else on the server is denied unless you say otherwise.
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blender_download. It is categorised as a Other tool in the Blender MCP Server, which means it performs auxiliary operations.
Register the Blender MCP server in PolicyLayer and add a rule for blender_download: 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. Nothing to install.
blender_download is a Other tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the blender_download 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.
Set action: deny in the PolicyLayer policy for blender_download. 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.
blender_download is provided by the Blender MCP server (sandraschi/blender-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Blender, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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77 Blender tools catalogued and risk-classified — across an index of 43,000+ MCP servers.