tldraw_add_shape · tldraw MCP: Risk & Policy

WHAT IT DOES

What tldraw_add_shape does on tldraw MCP

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

WHY IT NEEDS A POLICY

Why tldraw_add_shape needs a policy

An AI agent can call tldraw_add_shape faster than any human can review — one bad instruction and it creates or modifies resources in tldraw MCP by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tldraw_add_shape Rate-limited

tldraw_add_shape 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": {
    "tldraw_add_shape": {
      "limits": [
        {
          "counter": "tldraw_add_shape_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 tldraw MCP, so you can run agents against it safely.

FAQ

Questions about tldraw_add_shape

What does the tldraw_add_shape tool do? +

Add a new shape to a tldraw file. Returns the new shape ID. It is categorised as a Write tool in the tldraw MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tldraw_add_shape? +

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

What risk level is tldraw_add_shape? +

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

Can I rate-limit tldraw_add_shape? +

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

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

tldraw_add_shape is provided by the tldraw MCP server (talhaorak/tldraw-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.