whatsapp_parse_preview · Vcon MCP: Risk & Policy

WHAT IT DOES

What whatsapp_parse_preview does on Vcon

AI agents invoke whatsapp_parse_preview to trigger actions in Vcon. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why whatsapp_parse_preview needs a policy

whatsapp_parse_preview triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

whatsapp_parse_preview Rate-limited

whatsapp_parse_preview stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_parse_preview": {
      "limits": [
        {
          "counter": "whatsapp_parse_preview_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Vcon, so you can run agents against it safely.

FAQ

Questions about whatsapp_parse_preview

What does the whatsapp_parse_preview tool do? +

Parse a WhatsApp chat export and return a preview without creating a vCon. It is categorised as a Execute tool in the Vcon MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on whatsapp_parse_preview? +

Register the Vcon MCP server in PolicyLayer and add a rule for whatsapp_parse_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 Vcon. Nothing to install.

What risk level is whatsapp_parse_preview? +

whatsapp_parse_preview is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit whatsapp_parse_preview? +

Yes. Add a rate_limit block to the whatsapp_parse_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 whatsapp_parse_preview completely? +

Set action: deny in the PolicyLayer policy for whatsapp_parse_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 whatsapp_parse_preview? +

whatsapp_parse_preview is provided by the Vcon MCP server (vcon-dev/vcon-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.