symmetry_position · Open Brush MCP Server MCP: Risk & Policy

WHAT IT DOES

What symmetry_position does on Open Brush MCP Server

AI agents use symmetry_position to create or update resources in Open Brush MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Open Brush MCP Server environment.

WHY IT NEEDS A POLICY

Why symmetry_position needs a policy

The tool modifies drawing application state by repositioning a symmetry widget, which affects how subsequent drawing operations are mirrored or transformed. This is reversible (the widget can be moved again) and non-destructive, making it Write rather than Execute or Destructive. Severity is medium because misuse could disrupt the user's intended artwork composition, but changes can be undone.

From the tool's definition Tool name 'symmetry_position' combined with description 'Moves symmetry widget' indicates modification of UI/drawing state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

symmetry_position Rate-limited

symmetry_position 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": {
    "symmetry_position": {
      "limits": [
        {
          "counter": "symmetry_position_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 Open Brush MCP Server, so you can run agents against it safely.

FAQ

Questions about symmetry_position

What does the symmetry_position tool do? +

Moves symmetry widget. It is categorised as a Write tool in the Open Brush MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on symmetry_position? +

Register the Open Brush MCP Server MCP server in PolicyLayer and add a rule for symmetry_position: 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 Open Brush MCP Server. Nothing to install.

What risk level is symmetry_position? +

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

Can I rate-limit symmetry_position? +

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

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

symmetry_position is provided by the Open Brush MCP Server MCP server (moz411/openbrush-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.