wa_send_text

Send a text message to a WhatsApp contact or group. Args: - instanceId: The instance to send from - to: Recipient phone number (e.g.

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-send-text.md

WHAT IT DOES

What wa_send_text does on WA MCP

AI agents use wa_send_text 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_send_text is rated Medium

This tool creates new data (messages) in WhatsApp and modifies communication state. While reversible (messages can be deleted), sending messages is a Write operation that creates new artifacts in an external system. Severity is high because an AI agent could spam contacts, harass users, or spread misinformation at scale without proper authorization checks.

From the tool's definition Tool sends messages to WhatsApp contacts or groups. The description explicitly states 'Send a text message to a WhatsApp contact or group' using instanceId and recipient phone number arguments.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs wa_send_text 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_send_text, this is the rule to start with:

wa_send_text Rate-limited

wa_send_text 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_send_text": {
      "limits": [
        {
          "counter": "wa_send_text_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_send_text call is checked against it from then on.

FAQ

Questions about wa_send_text

What does the wa_send_text tool do? +

Send a text message to a WhatsApp contact or group. Args: - instanceId: The instance to send from - to: Recipient phone number (e.g. 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_send_text? +

Register the WA MCP server in PolicyLayer and add a rule for wa_send_text: 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_send_text? +

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

Can I rate-limit wa_send_text? +

Yes. Add a rate_limit block to the wa_send_text 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_send_text completely? +

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

wa_send_text 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.

KEEP EXPLORING

More on WA, and thousands of servers like it.

This server

All 62 WA tools →

Across the catalogue

sms_send on Twilio SMS MCP Server →send-draft on Meme MCP Server →mail_send_draft on Apple Apps MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →