selection_select_all · Open Brush MCP Server MCP

WHAT IT DOES

What selection_select_all does on Open Brush MCP Server

AI agents use selection_select_all 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 selection_select_all needs a policy

Selecting strokes is a reversible data state change (selecting/deselecting) within the 3D painting application. It does not retrieve external data (Read), execute arbitrary code (Execute), delete content (Destructive), or involve financial operations (Financial). Selection is a preparatory action for subsequent edits, making it a Write operation.

From the tool's definition Tool name 'selection_select_all' and description 'Selects all strokes' indicate a state modification operation that modifies the selection state within Open Brush without creating, deleting, or executing external operations.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

selection_select_all Rate-limited

selection_select_all 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": {
    "selection_select_all": {
      "limits": [
        {
          "counter": "selection_select_all_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 selection_select_all

What does the selection_select_all tool do? +

Selects all strokes. 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 selection_select_all? +

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

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

Can I rate-limit selection_select_all? +

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

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

selection_select_all 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.