create_contact_phone · CATS MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_contact_phone does on CATS MCP Server

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

WHY IT NEEDS A POLICY

Why create_contact_phone needs a policy

This tool creates or modifies contact data by adding a phone number. It is reversible (the phone number can be removed or updated), so it falls under Write rather than Destructive. The blast radius is low—adding a phone number to a contact record in an ATS poses minimal risk of harm even if misused by an AI agent, as it does not delete data, execute code, or cause financial impact.

From the tool's definition Tool name 'create_contact_phone' and description 'Add a phone number to a contact' indicate creation of a new contact phone record, which is a reversible write operation on applicant tracking system data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_contact_phone Rate-limited

create_contact_phone 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_phone": {
      "limits": [
        {
          "counter": "create_contact_phone_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 CATS MCP Server, so you can run agents against it safely.

FAQ

Questions about create_contact_phone

What does the create_contact_phone tool do? +

Add a phone number to a contact. It is categorised as a Write tool in the CATS 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_phone? +

Register the CATS MCP Server MCP server in PolicyLayer and add a rule for create_contact_phone: 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 CATS MCP Server. Nothing to install.

What risk level is create_contact_phone? +

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

Can I rate-limit create_contact_phone? +

Yes. Add a rate_limit block to the create_contact_phone 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_phone completely? +

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

create_contact_phone is provided by the CATS MCP Server MCP server (vanman2024/cats-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.