create_contact_list · XEM Email MCP Server MCP

WHAT IT DOES

What create_contact_list does on XEM Email MCP Server

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

WHY IT NEEDS A POLICY

Why create_contact_list needs a policy

This tool creates new data (a contact list) but does not delete, overwrite irreversibly, or execute code. It is reversible—contact lists can be modified or removed. The severity is medium because misuse could result in creation of unauthorized recipient lists used for spam or phishing campaigns, but the operation itself is not destructive.

From the tool's definition The tool 'create_contact_list' creates a new contact list, which is a data creation operation. The server description explicitly mentions 'organize contact lists' and 'bulk contact imports from CSV files', confirming write capabilities.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_contact_list Rate-limited

create_contact_list 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": {
    "create_contact_list": {
      "limits": [
        {
          "counter": "create_contact_list_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 XEM Email MCP Server, so you can run agents against it safely.

FAQ

Questions about create_contact_list

What does the create_contact_list tool do? +

Create a new contact list for organizing email recipients. It is categorised as a Write tool in the XEM Email 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 create_contact_list? +

Register the XEM Email MCP Server MCP server in PolicyLayer and add a rule for create_contact_list: 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 XEM Email MCP Server. Nothing to install.

What risk level is create_contact_list? +

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

Can I rate-limit create_contact_list? +

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

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

create_contact_list is provided by the XEM Email MCP Server MCP server (mailxem/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.