share_board_with_user · Miro MCP Server MCP: Risk & Policy

WHAT IT DOES

What share_board_with_user does on Miro MCP Server

AI agents use share_board_with_user 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 share_board_with_user needs a policy

share_board_with_user creates a new collaborator relationship on a board—a reversible modification of access control metadata. This is not destructive (the invitation can be revoked), not financial, not code execution. It is Write because it durably modifies board state by adding a new principal with collaborator privileges.

From the tool's definition Tool description states it 'Invite a user to collaborate on a board via email', which creates a new access/permission record.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

share_board_with_user Rate-limited

share_board_with_user 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": {
    "share_board_with_user": {
      "limits": [
        {
          "counter": "share_board_with_user_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 share_board_with_user

What does the share_board_with_user tool do? +

Invite a user to collaborate on a board via email. 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 share_board_with_user? +

Register the Miro MCP Server MCP server in PolicyLayer and add a rule for share_board_with_user: 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 share_board_with_user? +

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

Can I rate-limit share_board_with_user? +

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

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

share_board_with_user 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.