🚀 EXECUTES background scripts with THREE methods: (1) sys_trigger [DEFAULT & MOST RELIABLE] - Creates scheduled job that runs in 1 second and auto-deletes, (2) UI endpoint (sys.scripts.do) - Attempts direct execution via UI, (3) Fix script - Manual fallback. Use for: setting update sets, complex...
Part of the Servicenow server.
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AI agents invoke SN-Execute-Background-Script to trigger processes or run actions in Servicenow. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
SN-Execute-Background-Script can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"SN-Execute-Background-Script": {
"limits": [
{
"counter": "sn-execute-background-script_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Servicenow policy for all 45 tools.
These attack patterns abuse exactly the kind of access SN-Execute-Background-Script gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
🚀 EXECUTES background scripts with THREE methods: (1) sys_trigger [DEFAULT & MOST RELIABLE] - Creates scheduled job that runs in 1 second and auto-deletes, (2) UI endpoint (sys.scripts.do) - Attempts direct execution via UI, (3) Fix script - Manual fallback. Use for: setting update sets, complex GlideRecord operations, GlideUpdateSet API calls, etc. The sys_trigger method is most reliable and works consistently!. It is categorised as a Execute tool in the Servicenow MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Servicenow MCP server in PolicyLayer and add a rule for SN-Execute-Background-Script: 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. Nothing to install.
SN-Execute-Background-Script is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the SN-Execute-Background-Script 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.
Set action: deny in the PolicyLayer policy for SN-Execute-Background-Script. 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.
SN-Execute-Background-Script is provided by the Servicenow MCP server (pypi:servicenow-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 45 Servicenow tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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