create_contact_email · CATS MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_contact_email does on CATS MCP Server

AI agents use create_contact_email 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_email needs a policy

This tool creates or modifies contact data by appending an email address to an existing contact record. This is a Write operation as it reversibly modifies contact information in the CATS system. It lacks the destructive finality of deletion, the code-execution nature of Execute tools, or financial impact.

From the tool's definition Tool name: 'create_contact_email'; description: 'Add an email address to a contact.' The verb 'Add' and the action of creating/attaching an email to a contact record indicates data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_contact_email Rate-limited

create_contact_email 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_email": {
      "limits": [
        {
          "counter": "create_contact_email_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_email

What does the create_contact_email tool do? +

Add an email address 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_email? +

Register the CATS MCP Server MCP server in PolicyLayer and add a rule for create_contact_email: 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_email? +

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

Can I rate-limit create_contact_email? +

Yes. Add a rate_limit block to the create_contact_email 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_email completely? +

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

create_contact_email 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.