snow_create_saved_filter · Serac MCP: Risk & Policy

WHAT IT DOES

What snow_create_saved_filter does on Serac

AI agents use snow_create_saved_filter 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_create_saved_filter needs a policy

This tool creates and stores a filter definition in ServiceNow, which is a reversible write operation. Filters are configuration metadata that can be modified or deleted without destructive consequences. The action is narrowly scoped to filter management with no ability to access, modify, or delete actual business data.

From the tool's definition Tool name 'snow_create_saved_filter' and description 'Create a saved filter for any ServiceNow table that appears in the filter dropdown' indicate creation of a reusable filter configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

snow_create_saved_filter Rate-limited

snow_create_saved_filter 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_create_saved_filter": {
      "limits": [
        {
          "counter": "snow_create_saved_filter_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_create_saved_filter

What does the snow_create_saved_filter tool do? +

Create a saved filter for any ServiceNow table that appears in the filter dropdown. 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_create_saved_filter? +

Register the Serac MCP server in PolicyLayer and add a rule for snow_create_saved_filter: 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_create_saved_filter? +

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

Can I rate-limit snow_create_saved_filter? +

Yes. Add a rate_limit block to the snow_create_saved_filter 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_create_saved_filter completely? +

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

snow_create_saved_filter 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.