blender_session

THE RISK

Low Risk

Why blender_session needs a policy

With no description available, it's unclear what this tool does. The name 'blender_session' could imply session management (start/stop/query a Blender session), which might be Write or Execute, but without evidence we cannot confidently assign a more specific category. Confidence is very low due to the empty description.

From the tool's definition Tool name is 'blender_session' and the description is empty or uninformative.

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

POLICY

How to control blender_session

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_session:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "blender_session": {
      "limits": [
        {
          "counter": "blender_session_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

blender_session gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Blender tools

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All 77 Blender tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about blender_session

What does the blender_session tool do? +

blender_session. It is categorised as a Other tool in the Blender MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on blender_session? +

Register the Blender MCP server in PolicyLayer and add a rule for blender_session: 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.

What risk level is blender_session? +

blender_session is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit blender_session? +

Yes. Add a rate_limit block to the blender_session 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_session completely? +

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

blender_session 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.

Enforce policy on every Blender tool call.

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

CHECK YOUR STACK →