snow_generate_guid · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_generate_guid does on Serac

AI agents use snow_generate_guid to create or update resources in Serac — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Serac environment.

WHY IT NEEDS A POLICY

Why snow_generate_guid needs a policy

An AI agent can call snow_generate_guid faster than any human can review — one bad instruction and it creates or modifies resources in Serac by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_generate_guid Rate-limited

snow_generate_guid 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": {
    "snow_generate_guid": {
      "limits": [
        {
          "counter": "snow_generate_guid_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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_generate_guid

What does the snow_generate_guid tool do? +

Generate a unique identifier in one of three shapes: ServiceNow sys_id (32-char hex, no dashes), uppercase GUID, or lowercase UUID. Uses crypto.randomUUID — safe for IDs but not for secrets. It is categorised as a Write tool in the Serac MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on snow_generate_guid? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_generate_guid: 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_generate_guid? +

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

Can I rate-limit snow_generate_guid? +

Yes. Add a rate_limit block to the snow_generate_guid 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_generate_guid completely? +

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

snow_generate_guid 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.

// THE FULL RECORD

snow_generate_guid is one line of Serac's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →