wa_unblock_contact

Unblock a previously blocked WhatsApp contact.

SERVERWA MCP SOURCEdelltrak/wamcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/delltrak-wamcp/wa-unblock-contact.md

WHAT IT DOES

What wa_unblock_contact does on WA MCP

AI agents use wa_unblock_contact 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.

RISK

Why wa_unblock_contact is rated Medium

This tool modifies contact relationship state by removing a block, which is a reversible write operation. It has no direct financial impact and does not execute arbitrary code or delete data. The severity is medium because unblocking a contact could enable unwanted communications or restore access to a contact the user intentionally blocked, potentially exposing the user to harassment or unwanted messages.

From the tool's definition Tool name 'wa_unblock_contact' and description 'Unblock a previously blocked WhatsApp contact' indicate a reversible modification of contact blocking status.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs wa_unblock_contact safely

PolicyLayer is an MCP gateway: it sits between your AI agents and WA MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For wa_unblock_contact, this is the rule to start with:

wa_unblock_contact Rate-limited

wa_unblock_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": {
    "wa_unblock_contact": {
      "limits": [
        {
          "counter": "wa_unblock_contact_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect WA MCP, apply this rule, and every wa_unblock_contact call is checked against it from then on.

FAQ

Questions about wa_unblock_contact

What does the wa_unblock_contact tool do? +

Unblock a previously blocked WhatsApp contact. It is categorised as a Write tool in the WA MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wa_unblock_contact? +

Register the WA MCP server in PolicyLayer and add a rule for wa_unblock_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 WA MCP. Nothing to install.

What risk level is wa_unblock_contact? +

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

Can I rate-limit wa_unblock_contact? +

Yes. Add a rate_limit block to the wa_unblock_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 wa_unblock_contact completely? +

Set action: deny in the PolicyLayer policy for wa_unblock_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 wa_unblock_contact? +

wa_unblock_contact is provided by the WA MCP server (delltrak/wamcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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