# wa_group_update_subject

Change the name/subject of a WhatsApp group.

Agent View of the PolicyLayer registry record for `wa_group_update_subject`. HTML page: https://policylayer.com/tools/delltrak-wamcp/wa-group-update-subject

## Facts

- Tool: `wa_group_update_subject`
- Server: WA MCP (`delltrak/wamcp`) — https://policylayer.com/tools/delltrak-wamcp.md
- Homepage: https://github.com/delltrak/wamcp
- 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": "wa_group_update_subject",
    "arguments": {}
  }
}
```

## Why wa_group_update_subject is rated Medium

This tool modifies group metadata (the subject/name) but does not delete data or execute arbitrary code. The change is reversible: a group subject can be changed back. It affects only the group's naming property, making it a Write operation. Severity is medium because misuse could cause group confusion or social engineering within group contexts, but the impact is limited to metadata and easily corrected.

From the tool's own definition: "Tool name indicates 'update_subject' and description states 'Change the name/subject of a WhatsApp group' — a reversible modification operation."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on WA MCP (61)

- `wa_clear_chat` — Destructive — https://policylayer.com/tools/delltrak-wamcp/wa-clear-chat.md
- `wa_delete_chat` — Destructive — https://policylayer.com/tools/delltrak-wamcp/wa-delete-chat.md
- `wa_delete_instance` — Destructive — https://policylayer.com/tools/delltrak-wamcp/wa-delete-instance.md
- `wa_delete_message` — Destructive — https://policylayer.com/tools/delltrak-wamcp/wa-delete-message.md
- `wa_group_remove_participants` — Destructive — https://policylayer.com/tools/delltrak-wamcp/wa-group-remove-participants.md
- `wa_remove_profile_picture` — Destructive — https://policylayer.com/tools/delltrak-wamcp/wa-remove-profile-picture.md
- `wa_connect_instance` — Execute — https://policylayer.com/tools/delltrak-wamcp/wa-connect-instance.md
- `wa_disconnect_instance` — Execute — https://policylayer.com/tools/delltrak-wamcp/wa-disconnect-instance.md
- `wa_group_leave` — Execute — https://policylayer.com/tools/delltrak-wamcp/wa-group-leave.md
- `wa_reject_call` — Execute — https://policylayer.com/tools/delltrak-wamcp/wa-reject-call.md
- `wa_restart_instance` — Execute — https://policylayer.com/tools/delltrak-wamcp/wa-restart-instance.md
- `wa_send_presence` — Execute — https://policylayer.com/tools/delltrak-wamcp/wa-send-presence.md
- `wa_check_number_exists` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-check-number-exists.md
- `wa_get_business_profile` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-get-business-profile.md
- `wa_get_messages` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-get-messages.md
- `wa_get_pairing_code` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-get-pairing-code.md
- `wa_get_qr_code` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-get-qr-code.md
- `wa_group_get_invite_code` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-group-get-invite-code.md
- `wa_search_contact` — Read — https://policylayer.com/tools/delltrak-wamcp/wa-search-contact.md
- `wa_archive_chat` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-archive-chat.md
- `wa_block_contact` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-block-contact.md
- `wa_create_group` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-create-group.md
- `wa_create_instance` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-create-instance.md
- `wa_edit_message` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-edit-message.md
- `wa_forward_message` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-forward-message.md
- `wa_group_add_participants` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-group-add-participants.md
- `wa_group_demote` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-group-demote.md
- `wa_group_handle_request` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-group-handle-request.md
- `wa_group_join` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-group-join.md
- `wa_group_promote` — Write — https://policylayer.com/tools/delltrak-wamcp/wa-group-promote.md
- …and 31 more: https://policylayer.com/tools/delltrak-wamcp.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=delltrak-wamcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/delltrak-wamcp