snow_scripted_rest_api · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_scripted_rest_api does on Serac

AI agents invoke snow_scripted_rest_api 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_scripted_rest_api needs a policy

This tool can invoke arbitrary scripted REST endpoints with any HTTP method including POST, PUT, PATCH, and DELETE. Since these are 'scripted' endpoints on a ServiceNow instance, they may execute custom server-side code with unpredictable side effects ranging from data modification to deletion.

From the tool's definition Invoke a Scripted REST API resource... with chosen method (GET/POST/PUT/PATCH/DELETE) and optional JSON body

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_scripted_rest_api Rate-limited

snow_scripted_rest_api 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_scripted_rest_api": {
      "limits": [
        {
          "counter": "snow_scripted_rest_api_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_scripted_rest_api

What does the snow_scripted_rest_api tool do? +

Invoke a Scripted REST API resource at /api/<namespace>/<path> with chosen method (GET/POST/PUT/PATCH/DELETE) and optional JSON body. Use for instance-defined REST endpoints; for stock table API use snow_custom_api. 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_scripted_rest_api? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_scripted_rest_api: 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_scripted_rest_api? +

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

Can I rate-limit snow_scripted_rest_api? +

Yes. Add a rate_limit block to the snow_scripted_rest_api 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_scripted_rest_api completely? +

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

snow_scripted_rest_api 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_scripted_rest_api 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.

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