matomo_add_user · Matomo MCP Server MCP: Risk & Policy

WHAT IT DOES

What matomo_add_user does on Matomo MCP Server

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

WHY IT NEEDS A POLICY

Why matomo_add_user needs a policy

This tool creates/adds a new user account to the Matomo system, which is a reversible write operation. It modifies the user database but does not delete or destroy data. Severity is medium because inappropriate user creation could grant unintended access to analytics data or compromise account integrity, but the operation is reversible through user deletion.

From the tool's definition Tool name 'matomo_add_user' and description 'Thêm một user mới vào Matomo' (Vietnamese: 'Add a new user to Matomo') indicate creation of a new user account.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

matomo_add_user Rate-limited

matomo_add_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": {
    "matomo_add_user": {
      "limits": [
        {
          "counter": "matomo_add_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 Matomo MCP Server, so you can run agents against it safely.

FAQ

Questions about matomo_add_user

What does the matomo_add_user tool do? +

Thêm một user mới vào Matomo. It is categorised as a Write tool in the Matomo 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 matomo_add_user? +

Register the Matomo MCP Server MCP server in PolicyLayer and add a rule for matomo_add_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 Matomo MCP Server. Nothing to install.

What risk level is matomo_add_user? +

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

Can I rate-limit matomo_add_user? +

Yes. Add a rate_limit block to the matomo_add_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 matomo_add_user completely? +

Set action: deny in the PolicyLayer policy for matomo_add_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 matomo_add_user? +

matomo_add_user is provided by the Matomo MCP Server MCP server (thichcode/matomo_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.