update_board · Miro MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_board does on Miro MCP Server

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

WHY IT NEEDS A POLICY

Why update_board needs a policy

This tool modifies board properties without deleting or destroying data, and does not execute arbitrary code or move financial resources. The update is reversible—properties can be changed again. Severity is medium because modifying a shared board could disrupt team collaboration or overwrite important settings, but the action is not irreversible and has contained blast radius within that board.

From the tool's definition Tool name 'update_board' and description 'Update board properties' indicate modification of existing board data. The verb 'update' is characteristic of Write operations that create or modify data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_board Rate-limited

update_board 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": {
    "update_board": {
      "limits": [
        {
          "counter": "update_board_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 Miro MCP Server, so you can run agents against it safely.

FAQ

Questions about update_board

What does the update_board tool do? +

Update board properties. It is categorised as a Write tool in the Miro 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 update_board? +

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

What risk level is update_board? +

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

Can I rate-limit update_board? +

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

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

update_board is provided by the Miro MCP Server MCP server (soul-script/miro-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.