layer_show · Open Brush MCP Server MCP: Risk & Policy

WHAT IT DOES

What layer_show does on Open Brush MCP Server

AI agents use layer_show 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 layer_show needs a policy

Showing a layer changes its visibility state, which is a reversible modification to the scene's display settings. It does not delete data or execute arbitrary code, making Write the most appropriate category.

From the tool's definition Shows a layer — this modifies the visibility state of a layer (reversible action)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

layer_show Rate-limited

layer_show 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": {
    "layer_show": {
      "limits": [
        {
          "counter": "layer_show_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 layer_show

What does the layer_show tool do? +

Shows a layer. 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 layer_show? +

Register the Open Brush MCP Server MCP server in PolicyLayer and add a rule for layer_show: 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 layer_show? +

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

Can I rate-limit layer_show? +

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

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

layer_show 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.

// THE FULL RECORD

layer_show is one line of Open Brush MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →