fire_event

Fire a custom ServiceNow event for a specific record (requires WRITE_ENABLED=true)

SERVERServiceNow MCP Server SOURCE@aartiq/servicenow-mcp

High RISK CLASS

Category Execute

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/fire-event.md

WHAT IT DOES

What fire_event does on ServiceNow MCP Server

AI agents invoke fire_event to trigger actions in ServiceNow MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why fire_event is rated High

Firing an event triggers external operations and workflows in ServiceNow (e.g., business rules, notifications, escalations). This is an execution action with potentially broad side effects depending on the event type and associated handlers. It is not merely writing data but triggering system-level operations, making Execute the appropriate category. The WRITE_ENABLED guard confirms it has real side effects.

From the tool's definition Fire a custom ServiceNow event for a specific record

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs fire_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 fire_event, this is the rule to start with:

fire_event Rate-limited

fire_event stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "fire_event": {
      "limits": [
        {
          "counter": "fire_event_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 fire_event call is checked against it from then on.

FAQ

Questions about fire_event

What does the fire_event tool do? +

Fire a custom ServiceNow event for a specific record (requires WRITE_ENABLED=true). It is categorised as a Execute tool in the ServiceNow MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on fire_event? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for fire_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 fire_event? +

fire_event is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit fire_event? +

Yes. Add a rate_limit block to the fire_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 fire_event completely? +

Set action: deny in the PolicyLayer policy for fire_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 fire_event? +

fire_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

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