register_event

SERVERServiceNow MCP Server SOURCE@aartiq/servicenow-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/servicenow-mcp-server/register-event.md

WHAT IT DOES

What register_event does on ServiceNow MCP Server

AI agents use register_event 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.

RISK

Why register_event is rated Medium

This tool creates a new entry in the event registry, which is a Write operation (creating data). However, it requires SCRIPTING_ENABLED=true, suggesting it may trigger scripted actions or workflows downstream, raising the severity. It is not inherently destructive or financial, but misuse could introduce malicious event hooks into the ServiceNow platform, making the blast radius high.

From the tool's definition Register a new custom event in the event registry

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs register_event safely

PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceNow MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For register_event, this is the rule to start with:

register_event Rate-limited

register_event 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": {
    "register_event": {
      "limits": [
        {
          "counter": "register_event_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ServiceNow MCP Server, apply this rule, and every register_event call is checked against it from then on.

FAQ

Questions about register_event

What does the register_event tool do? +

Register a new custom event in the event registry (requires SCRIPTING_ENABLED=true). 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 register_event? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for register_event: 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 register_event? +

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

Can I rate-limit register_event? +

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

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

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

KEEP EXPLORING

More on ServiceNow MCP Server, and thousands of servers like it.

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All 365 ServiceNow MCP Server tools →

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team_manager_register_agents on Team Manager MCP →calendar_create_event on Apple Apps MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →