update_hr_case · ServiceNow- MCP: Risk & Policy

WHAT IT DOES

What update_hr_case does on ServiceNow-MCP

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

WHY IT NEEDS A POLICY

Why update_hr_case needs a policy

This tool creates or modifies data reversibly by updating fields on HR cases. HR cases often contain sensitive personal information (employee names, addresses, compensation, performance details, medical information). Unauthorized modifications could affect employee records, payroll, benefits, or compliance documentation.

From the tool's definition Tool name is 'update_hr_case' and description states 'Update fields on an existing HR case (requires WRITE_ENABLED=true)'. The verb 'Update' and the requirement for WRITE_ENABLED flag clearly indicate this modifies existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_hr_case Rate-limited

update_hr_case 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": {
    "update_hr_case": {
      "limits": [
        {
          "counter": "update_hr_case_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, so you can run agents against it safely.

FAQ

Questions about update_hr_case

What does the update_hr_case tool do? +

Update fields on an existing HR case (requires WRITE_ENABLED=true). It is categorised as a Write tool in the ServiceNow-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_hr_case? +

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

What risk level is update_hr_case? +

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

Can I rate-limit update_hr_case? +

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

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

update_hr_case is provided by the ServiceNow- MCP server (tedorigawa001/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.