save_blend_file

Save the current Blender scene to a .blend file

SERVERBlenderMCP SOURCEaryeon0228/blendermcp

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/aryeon0228-blendermcp/save-blend-file.md

WHAT IT DOES

What save_blend_file does on BlenderMCP

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

RISK

Why save_blend_file is rated Medium

This tool creates or modifies a file on the user's filesystem by serializing the current Blender scene state. While reversible (files can be edited or deleted manually), it commits data to storage and could overwrite existing .blend files if not carefully used. The impact is scoped to file I/O rather than system-wide operations, making it Write rather than Execute.

From the tool's definition Tool name 'save_blend_file' and description 'Save the current Blender scene to a .blend file' indicate data persistence to disk.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs save_blend_file safely

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

save_blend_file Rate-limited

save_blend_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": {
    "save_blend_file": {
      "limits": [
        {
          "counter": "save_blend_file_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 BlenderMCP, apply this rule, and every save_blend_file call is checked against it from then on.

FAQ

Questions about save_blend_file

What does the save_blend_file tool do? +

Save the current Blender scene to a .blend file. It is categorised as a Write tool in the BlenderMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on save_blend_file? +

Register the Blender MCP server in PolicyLayer and add a rule for save_blend_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 BlenderMCP. Nothing to install.

What risk level is save_blend_file? +

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

Can I rate-limit save_blend_file? +

Yes. Add a rate_limit block to the save_blend_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 save_blend_file completely? +

Set action: deny in the PolicyLayer policy for save_blend_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 save_blend_file? +

save_blend_file is provided by the Blender MCP server (aryeon0228/blendermcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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