mark_sharp_by_angle · Blender MCP: Risk & Policy

WHAT IT DOES

What mark_sharp_by_angle does on BlenderMCP

AI agents invoke mark_sharp_by_angle to trigger actions in BlenderMCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why mark_sharp_by_angle needs a policy

Based on the tool name, it likely marks edges as sharp in Blender based on an angle threshold, which modifies mesh data within the Blender environment. This is a Write/Execute operation within Blender's 3D modeling context. Given the empty description, confidence is low.

From the tool's definition Tool name 'mark_sharp_by_angle' and server context of Blender 3D modeling operations; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mark_sharp_by_angle Rate-limited

mark_sharp_by_angle stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mark_sharp_by_angle": {
      "limits": [
        {
          "counter": "mark_sharp_by_angle_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches BlenderMCP, so you can run agents against it safely.

FAQ

Questions about mark_sharp_by_angle

What does the mark_sharp_by_angle tool do? +

mark_sharp_by_angle. It is categorised as a Execute tool in the BlenderMCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mark_sharp_by_angle? +

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

mark_sharp_by_angle is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit mark_sharp_by_angle? +

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

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

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