clear_scene

Remove all objects from the current scene.

SERVERBlender SOURCEsandraschi/blender-mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/sandraschi-blender-mcp/clear-scene.md

WHAT IT DOES

What clear_scene does on Blender

AI agents call clear_scene to permanently remove resources in Blender, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why clear_scene is rated Critical

This tool permanently removes all objects from a Blender scene, which is an irreversible operation that cannot be undone by normal means (beyond undo history). While not as catastrophic as deleting files from disk, clearing an entire scene represents a destructive action with significant blast radius—an AI agent could lose hours of 3D work.

From the tool's definition Tool name 'clear_scene' and description 'Remove all objects from the current scene' indicate irreversible deletion of scene content.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs clear_scene safely

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

clear_scene Hidden

clear_scene is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "clear_scene"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Blender, apply this rule, and every clear_scene call is checked against it from then on.

FAQ

Questions about clear_scene

What does the clear_scene tool do? +

Remove all objects from the current scene. It is categorised as a Destructive tool in the Blender MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on clear_scene? +

Register the Blender MCP server in PolicyLayer and add a rule for clear_scene: 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 clear_scene? +

clear_scene is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit clear_scene? +

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

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

clear_scene 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.

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