wa_send_view_once

Send a view-once image or video. The media disappears after the recipient views it once.

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-view-once.md

WHAT IT DOES

What wa_send_view_once does on WA MCP

AI agents use wa_send_view_once 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_view_once is rated Medium

This tool creates new message content and transmits it to recipients, modifying WhatsApp chat state. While the message technically disappears, the send action itself is reversible by deleting the message before viewing (if possible), and no permanent data destruction occurs on the sender's system. The primary action is content creation and transmission (Write).

From the tool's definition 'Send a view-once image or video' - creates and transmits message content that modifies chat state and recipient experience; 'media disappears after the recipient views it once' indicates irreversible (from recipient perspective) message delivery with…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs wa_send_view_once 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_view_once, this is the rule to start with:

wa_send_view_once Rate-limited

wa_send_view_once 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_view_once": {
      "limits": [
        {
          "counter": "wa_send_view_once_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_view_once call is checked against it from then on.

FAQ

Questions about wa_send_view_once

What does the wa_send_view_once tool do? +

Send a view-once image or video. The media disappears after the recipient views it once. 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_view_once? +

Register the WA MCP server in PolicyLayer and add a rule for wa_send_view_once: 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_view_once? +

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

Can I rate-limit wa_send_view_once? +

Yes. Add a rate_limit block to the wa_send_view_once 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_view_once completely? +

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

wa_send_view_once 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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