wa_send_link_preview

Send a text message with a rich link preview. The URL is used to generate the preview.

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-link-preview.md

WHAT IT DOES

What wa_send_link_preview does on WA MCP

AI agents use wa_send_link_preview 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_link_preview is rated Medium

Sending messages is a reversible write operation that modifies conversation state. While messaging itself is benign, this tool could be misused by an AI agent to send unsolicited messages, phishing links, spam, or malicious content to arbitrary contacts or groups. The 'medium' severity reflects the reputational and harassment risks without direct financial or destructive consequences.

From the tool's definition Tool description states 'Send a text message with a rich link preview', indicating it creates/sends a message (Write action).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs wa_send_link_preview 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_link_preview, this is the rule to start with:

wa_send_link_preview Rate-limited

wa_send_link_preview 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_link_preview": {
      "limits": [
        {
          "counter": "wa_send_link_preview_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_link_preview call is checked against it from then on.

FAQ

Questions about wa_send_link_preview

What does the wa_send_link_preview tool do? +

Send a text message with a rich link preview. The URL is used to generate the preview. 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_link_preview? +

Register the WA MCP server in PolicyLayer and add a rule for wa_send_link_preview: 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_link_preview? +

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

Can I rate-limit wa_send_link_preview? +

Yes. Add a rate_limit block to the wa_send_link_preview 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_link_preview completely? +

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

wa_send_link_preview 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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