snow_trace_execution · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_trace_execution does on Serac

AI agents use snow_trace_execution 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_trace_execution needs a policy

This tool creates a persistent trace session in ServiceNow — a reversible data structure (can be modified or cleared later). While it enables visibility into script execution, the act of creating and configuring a trace session modifies system state. It is not destructive since trace sessions can be cleared/reconfigured.

From the tool's definition Tool name 'snow_trace_execution' and description states it 'Creates a trace session that scripts can write to', indicating creation of a configuration artifact.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_trace_execution Rate-limited

snow_trace_execution 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_trace_execution": {
      "limits": [
        {
          "counter": "snow_trace_execution_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_trace_execution

What does the snow_trace_execution tool do? +

Set up execution tracing configuration. Creates a trace session that scripts can write to. Use snow_get_script_output to retrieve trace data later. 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_trace_execution? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_trace_execution: 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_trace_execution? +

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

Can I rate-limit snow_trace_execution? +

Yes. Add a rate_limit block to the snow_trace_execution 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_trace_execution completely? +

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

snow_trace_execution 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.