snow_send_va_message · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_send_va_message does on Serac

AI agents invoke snow_send_va_message to trigger actions in Serac. 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 snow_send_va_message needs a policy

This tool actively sends messages to and interacts with the Virtual Agent chatbot, triggering external operations whose effects depend on the message content. Simulating user interaction can invoke automated workflows, trigger business processes, or cause state changes in ServiceNow depending on what the chatbot handles. This goes beyond passive reading — it executes interactions that may have downstream effects.

From the tool's definition Sends a message to Virtual Agent and gets the response. Simulates user interaction with the chatbot.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_send_va_message Rate-limited

snow_send_va_message 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": {
    "snow_send_va_message": {
      "limits": [
        {
          "counter": "snow_send_va_message_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 Serac, so you can run agents against it safely.

FAQ

Questions about snow_send_va_message

What does the snow_send_va_message tool do? +

Sends a message to Virtual Agent and gets the response. Simulates user interaction with the chatbot. It is categorised as a Execute tool in the Serac MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on snow_send_va_message? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_send_va_message: 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 Serac. Nothing to install.

What risk level is snow_send_va_message? +

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

Can I rate-limit snow_send_va_message? +

Yes. Add a rate_limit block to the snow_send_va_message 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 snow_send_va_message completely? +

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

snow_send_va_message is provided by the Serac MCP server (serac-labs/serac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.