whatsapp_sync_contacts · WSAPI WhatsApp MCP Server MCP

WHAT IT DOES

What whatsapp_sync_contacts does on WSAPI WhatsApp MCP Server

AI agents invoke whatsapp_sync_contacts to trigger actions in WSAPI WhatsApp MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why whatsapp_sync_contacts needs a policy

This tool executes a synchronous operation that initiates contact synchronization with WhatsApp's backend servers. While not destructive or financially damaging, it triggers an external operation beyond simple data retrieval (Read) or local modification (Write). The sync operation can have side effects on the WhatsApp session state and contact list state that depend on runtime conditions.

From the tool's definition "Trigger a full contact sync from the WhatsApp server" - the verb "trigger" indicates initiation of an external operation (synchronization with WhatsApp servers) whose effects depend on the current state of the account and server.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

whatsapp_sync_contacts Rate-limited

whatsapp_sync_contacts stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "whatsapp_sync_contacts": {
      "limits": [
        {
          "counter": "whatsapp_sync_contacts_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches WSAPI WhatsApp MCP Server, so you can run agents against it safely.

FAQ

Questions about whatsapp_sync_contacts

What does the whatsapp_sync_contacts tool do? +

Trigger a full contact sync from the WhatsApp server. It is categorised as a Execute tool in the WSAPI WhatsApp MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on whatsapp_sync_contacts? +

Register the WSAPI WhatsApp MCP Server MCP server in PolicyLayer and add a rule for whatsapp_sync_contacts: 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 WSAPI WhatsApp MCP Server. Nothing to install.

What risk level is whatsapp_sync_contacts? +

whatsapp_sync_contacts is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit whatsapp_sync_contacts? +

Yes. Add a rate_limit block to the whatsapp_sync_contacts 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 whatsapp_sync_contacts completely? +

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

whatsapp_sync_contacts is provided by the WSAPI WhatsApp MCP Server MCP server (wsapi-chat/wsapi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.