add_change_task · ServiceNow MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_change_task does on ServiceNow MCP Server

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

WHY IT NEEDS A POLICY

Why add_change_task needs a policy

This tool creates a new task record associated with an existing change request in ServiceNow. While creating/modifying records, it does not execute code, delete data irreversibly, or move money. The action is reversible (the task can be deleted), so it falls under Write rather than Execute or Destructive.

From the tool's definition Tool name is 'add_change_task' and description states 'Add a task to a change request' — directly creates a new task record (reversible write operation).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_change_task Rate-limited

add_change_task 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": {
    "add_change_task": {
      "limits": [
        {
          "counter": "add_change_task_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches ServiceNow MCP Server, so you can run agents against it safely.

FAQ

Questions about add_change_task

What does the add_change_task tool do? +

Add a task to a change request. It is categorised as a Write tool in the ServiceNow MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_change_task? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for add_change_task: 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 ServiceNow MCP Server. Nothing to install.

What risk level is add_change_task? +

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

Can I rate-limit add_change_task? +

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

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

add_change_task is provided by the ServiceNow MCP Server MCP server (shameerampcome/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.