mark_seams_by_angle · Blender MCP: Risk & Policy

WHAT IT DOES

What mark_seams_by_angle does on BlenderMCP

AI agents use mark_seams_by_angle 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.

WHY IT NEEDS A POLICY

Why mark_seams_by_angle needs a policy

Based on the tool name, this likely marks UV seams on a mesh based on edge angles in Blender, which is a non-destructive write/modification operation on mesh data. Seams can be unmarked, so it's reversible. Confidence is low due to empty description.

From the tool's definition Tool name 'mark_seams_by_angle' — no description provided.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mark_seams_by_angle Rate-limited

mark_seams_by_angle 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": {
    "mark_seams_by_angle": {
      "limits": [
        {
          "counter": "mark_seams_by_angle_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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_seams_by_angle

What does the mark_seams_by_angle tool do? +

mark_seams_by_angle. 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 mark_seams_by_angle? +

Register the Blender MCP server in PolicyLayer and add a rule for mark_seams_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_seams_by_angle? +

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

Can I rate-limit mark_seams_by_angle? +

Yes. Add a rate_limit block to the mark_seams_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_seams_by_angle completely? +

Set action: deny in the PolicyLayer policy for mark_seams_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_seams_by_angle? +

mark_seams_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.