ungroup_elements · Excalidraw MCP Server MCP: Risk & Policy

WHAT IT DOES

What ungroup_elements does on Excalidraw MCP Server

AI agents use ungroup_elements 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 ungroup_elements needs a policy

This tool modifies the state of diagram elements by ungrouping them, which is a reversible operation. It does not delete data (making it not Destructive), does not execute arbitrary code (not Execute), does not retrieve data without side effects (not Read), and does not involve financial operations (not Financial). The modification is reversible—elements can be regrouped.

From the tool's definition Tool name 'ungroup_elements' and description 'Ungroup a group of elements' indicates a modification operation that alters the grouping structure of elements on the canvas without deleting or destroying data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ungroup_elements Rate-limited

ungroup_elements 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": {
    "ungroup_elements": {
      "limits": [
        {
          "counter": "ungroup_elements_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 ungroup_elements

What does the ungroup_elements tool do? +

Ungroup a group of elements. 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 ungroup_elements? +

Register the Excalidraw MCP Server MCP server in PolicyLayer and add a rule for ungroup_elements: 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 ungroup_elements? +

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

Can I rate-limit ungroup_elements? +

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

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

ungroup_elements 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.