create_contact · macOS MCP Servers MCP: Risk & Policy

WHAT IT DOES

What create_contact does on macOS MCP Servers

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

WHY IT NEEDS A POLICY

Why create_contact needs a policy

This tool creates new contact records in the native macOS Contacts app. While technically reversible (contacts can be deleted), it modifies persistent user data and could be misused to pollute contact lists with spam, phishing numbers, or fraudulent entries that harm the user. The Write category applies because it creates data without the irreversibility of Destructive actions.

From the tool's definition Tool name 'create_contact' and description 'Create a new contact with the provided information' indicate irreversible creation of user data in the Contacts application.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_contact Rate-limited

create_contact 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": {
      "limits": [
        {
          "counter": "create_contact_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 macOS MCP Servers, so you can run agents against it safely.

FAQ

Questions about create_contact

What does the create_contact tool do? +

Create a new contact with the provided information. It is categorised as a Write tool in the macOS MCP Servers 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? +

Register the macOS MCP Servers MCP server in PolicyLayer and add a rule for create_contact: 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 macOS MCP Servers. Nothing to install.

What risk level is create_contact? +

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

Can I rate-limit create_contact? +

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

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

create_contact is provided by the macOS MCP Servers MCP server (tdisawas0github/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.