export_to_excalidraw_url · Excalidraw MCP Server MCP

WHAT IT DOES

What export_to_excalidraw_url does on Excalidraw MCP Server

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

WHY IT NEEDS A POLICY

Why export_to_excalidraw_url needs a policy

This tool creates a new shareable resource (an encrypted diagram hosted on excalidraw.com) and returns a URL to access it. While the data itself is encrypted and the action is reversible (the URL/export can be removed), it does result in the creation of a persistent external resource that persists beyond the local canvas.

From the tool's definition Tool description states: 'Export the current canvas to a shareable excalidraw.com URL. The diagram is encrypted and uploaded' - this involves uploading/creating data on an external service.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_to_excalidraw_url Rate-limited

export_to_excalidraw_url 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": {
    "export_to_excalidraw_url": {
      "limits": [
        {
          "counter": "export_to_excalidraw_url_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 Excalidraw MCP Server, so you can run agents against it safely.

FAQ

Questions about export_to_excalidraw_url

What does the export_to_excalidraw_url tool do? +

Export the current canvas to a shareable excalidraw.com URL. The diagram is encrypted and uploaded; anyone with the URL can view it. Returns the shareable link. It is categorised as a Write tool in the Excalidraw 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 export_to_excalidraw_url? +

Register the Excalidraw MCP Server MCP server in PolicyLayer and add a rule for export_to_excalidraw_url: 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 Excalidraw MCP Server. Nothing to install.

What risk level is export_to_excalidraw_url? +

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

Can I rate-limit export_to_excalidraw_url? +

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

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

export_to_excalidraw_url is provided by the Excalidraw MCP Server MCP server (kakacoding1/mcp_excalidraw). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.