addListsMember · Xdevplatform/x MCP: Risk & Policy

WHAT IT DOES

What addListsMember does on Xdevplatform/xmcp

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

WHY IT NEEDS A POLICY

Why addListsMember needs a policy

This tool modifies data (list membership) in a reversible way by adding a user to a list. This is a Write operation rather than Read (it changes state) or Destructive (the change can be undone by removing the user).

From the tool's definition The tool name 'addListsMember' and description 'Add a user as a member of a list' indicate a membership modification operation that creates or alters a list's composition.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

addListsMember Rate-limited

addListsMember 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": {
    "addListsMember": {
      "limits": [
        {
          "counter": "addlistsmember_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 Xdevplatform/xmcp, so you can run agents against it safely.

FAQ

Questions about addListsMember

What does the addListsMember tool do? +

Add a user as a member of a list. It is categorised as a Write tool in the Xdevplatform/xmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on addListsMember? +

Register the Xdevplatform/x MCP server in PolicyLayer and add a rule for addListsMember: 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 Xdevplatform/xmcp. Nothing to install.

What risk level is addListsMember? +

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

Can I rate-limit addListsMember? +

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

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

addListsMember is provided by the Xdevplatform/x MCP server (xdevplatform/xmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

addListsMember is one line of Xdevplatform/x's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →