create_frame · Whiteboard MCP: Risk & Policy

WHAT IT DOES

What create_frame does on Whiteboard

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

WHY IT NEEDS A POLICY

Why create_frame needs a policy

This tool creates a new frame element in an Excalidraw diagram, which is a reversible write operation. It does not execute arbitrary code, delete data, move money, or trigger destructive actions. The modification is limited to adding a visual grouping container to the diagram, which can be undone.

From the tool's definition Tool name 'create_frame' combined with description stating it 'Create[s] an Excalidraw frame element' and groups/moves child elements.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_frame Rate-limited

create_frame 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": {
    "create_frame": {
      "limits": [
        {
          "counter": "create_frame_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 Whiteboard, so you can run agents against it safely.

FAQ

Questions about create_frame

What does the create_frame tool do? +

Create an Excalidraw frame element. A frame groups child elements visually and moves them together. Pass. It is categorised as a Write tool in the Whiteboard MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_frame? +

Register the Whiteboard MCP server in PolicyLayer and add a rule for create_frame: 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 Whiteboard. Nothing to install.

What risk level is create_frame? +

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

Can I rate-limit create_frame? +

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

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

create_frame is provided by the Whiteboard MCP server (kamiazya/whiteboard). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.