whatsapp_block_contact · WSAPI WhatsApp MCP Server MCP

WHAT IT DOES

What whatsapp_block_contact does on WSAPI WhatsApp MCP Server

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

WHY IT NEEDS A POLICY

Why whatsapp_block_contact needs a policy

This tool modifies contact state by preventing communication with a specific contact, which is a write operation. It is reversible (unlike destructive deletion) but has significant impact on user communication and privacy settings. The severity is high because an AI agent misusing this could block important business or personal contacts, disrupting critical communication channels.

From the tool's definition Tool name 'whatsapp_block_contact' and description 'Block a contact' indicate modification of contact state/relationship. Blocking is a reversible action (contacts can be unblocked) that alters communication permissions and contact metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

whatsapp_block_contact Rate-limited

whatsapp_block_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": {
    "whatsapp_block_contact": {
      "limits": [
        {
          "counter": "whatsapp_block_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 WSAPI WhatsApp MCP Server, so you can run agents against it safely.

FAQ

Questions about whatsapp_block_contact

What does the whatsapp_block_contact tool do? +

Block a contact. It is categorised as a Write tool in the WSAPI WhatsApp 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 whatsapp_block_contact? +

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

What risk level is whatsapp_block_contact? +

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

Can I rate-limit whatsapp_block_contact? +

Yes. Add a rate_limit block to the whatsapp_block_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 whatsapp_block_contact completely? +

Set action: deny in the PolicyLayer policy for whatsapp_block_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 whatsapp_block_contact? +

whatsapp_block_contact 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.