communications_unsubscribe_contact · HubSpot MCP Server MCP

WHAT IT DOES

What communications_unsubscribe_contact does on HubSpot MCP Server

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

WHY IT NEEDS A POLICY

Why communications_unsubscribe_contact needs a policy

This tool modifies data (unsubscribe status) reversibly—a contact can be re-subscribed if needed—making it a Write operation rather than Destructive. While it changes communication preferences, it does not delete data or cause irreversible harm.

From the tool's definition The tool 'communications_unsubscribe_contact' modifies a contact's subscription status by unsubscribing them from all email communications. This is a state-changing operation that affects contact data in HubSpot's CRM.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

communications_unsubscribe_contact Rate-limited

communications_unsubscribe_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": {
    "communications_unsubscribe_contact": {
      "limits": [
        {
          "counter": "communications_unsubscribe_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 HubSpot MCP Server, so you can run agents against it safely.

FAQ

Questions about communications_unsubscribe_contact

What does the communications_unsubscribe_contact tool do? +

Unsubscribe a contact from all email communications. It is categorised as a Write tool in the HubSpot 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 communications_unsubscribe_contact? +

Register the HubSpot MCP Server MCP server in PolicyLayer and add a rule for communications_unsubscribe_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 HubSpot MCP Server. Nothing to install.

What risk level is communications_unsubscribe_contact? +

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

Can I rate-limit communications_unsubscribe_contact? +

Yes. Add a rate_limit block to the communications_unsubscribe_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 communications_unsubscribe_contact completely? +

Set action: deny in the PolicyLayer policy for communications_unsubscribe_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 communications_unsubscribe_contact? +

communications_unsubscribe_contact is provided by the HubSpot MCP Server MCP server (kozo93/hubspot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.