# communications_subscribe_contact

Subscribe a contact to all email communications

Agent View of the PolicyLayer registry record for `communications_subscribe_contact`. HTML page: https://policylayer.com/tools/blacksand-software-hubspot-mcp/communications-subscribe-contact

## Facts

- Tool: `communications_subscribe_contact`
- Server: HubSpot MCP (`blacksand-software/hubspot-mcp`) — https://policylayer.com/tools/blacksand-software-hubspot-mcp.md
- Homepage: https://github.com/BlackSand-Software/hubspot-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "communications_subscribe_contact",
    "arguments": {}
  }
}
```

## Why communications_subscribe_contact is rated Medium

This tool modifies a contact's communication preferences by subscribing them to email communications. This is a Write operation because it changes data state reversibly (subscriptions can be toggled or unsubscribed). While it affects contact records, it does not delete data, execute arbitrary code, or commit financial transactions.

From the tool's own definition: "Tool name 'communications_subscribe_contact' and description 'Subscribe a contact to all email communications' indicate creating or modifying a contact's subscription state, which is a reversible data modification."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches HubSpot MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "communications_subscribe_contact": {
      "limits": [
        {
          "counter": "communications_subscribe_contact_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on HubSpot MCP (110)

- `calls_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/calls-archive.md
- `calls_batch_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/calls-batch-archive.md
- `crm_batch_delete_associations` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-batch-delete-associations.md
- `crm_batch_delete_objects` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-batch-delete-objects.md
- `crm_delete_association` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-delete-association.md
- `crm_delete_object` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-delete-object.md
- `emails_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/emails-archive.md
- `emails_batch_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/emails-batch-archive.md
- `engagement_details_delete` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/engagement-details-delete.md
- `meetings_batch_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/meetings-batch-archive.md
- `meetings_delete` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/meetings-delete.md
- `notes_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/notes-archive.md
- `notes_batch_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/notes-batch-archive.md
- `products_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/products-archive.md
- `products_batch_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/products-batch-archive.md
- `tasks_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/tasks-archive.md
- `tasks_batch_archive` — Destructive — https://policylayer.com/tools/blacksand-software-hubspot-mcp/tasks-batch-archive.md
- `calls_batch_read` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/calls-batch-read.md
- `calls_get` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/calls-get.md
- `calls_list` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/calls-list.md
- `calls_search` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/calls-search.md
- `communications_get_preferences` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/communications-get-preferences.md
- `communications_get_subscription_definitions` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/communications-get-subscription-definitions.md
- `communications_get_subscription_status` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/communications-get-subscription-status.md
- `crm_get_associations` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-get-associations.md
- `crm_get_company` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-get-company.md
- `crm_get_company_properties` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-get-company-properties.md
- `crm_get_contact` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-get-contact.md
- `crm_get_contact_properties` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-get-contact-properties.md
- `crm_get_lead` — Read — https://policylayer.com/tools/blacksand-software-hubspot-mcp/crm-get-lead.md
- …and 80 more: https://policylayer.com/tools/blacksand-software-hubspot-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=blacksand-software-hubspot-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/blacksand-software-hubspot-mcp