update_business_rule
Update a business rule (requires SCRIPTING_ENABLED=true)
This record as markdown: /tools/tedorigawa001-servicenow-mcp/update-business-rule.md
What update_business_rule does on ServiceNow-MCP
AI agents invoke update_business_rule to trigger actions in ServiceNow-MCP. 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.
Why update_business_rule is rated High
Business rules in ServiceNow are server-side JavaScript scripts that run on database events (insert, update, delete, query). Updating a business rule changes executable code that affects platform-wide behavior. This is Execute-level at minimum, with critical severity because a malicious or erroneous script could corrupt data, bypass security controls, escalate privileges, or cause widespread system disruption.
From the tool's definition 'Update a business rule (requires SCRIPTING_ENABLED=true)' — modifies server-side scripts that execute automatically on database operations across the entire ServiceNow platform
Attacks that exploit this kind of access
The rule that runs update_business_rule safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceNow-MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_business_rule, this is the rule to start with:
update_business_rule 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.
The button opens the PolicyLayer dashboard: create your workspace, connect ServiceNow-MCP, apply this rule, and every update_business_rule call is checked against it from then on.
Questions about update_business_rule
Update a business rule (requires SCRIPTING_ENABLED=true). It is categorised as a Execute tool in the ServiceNow-MCP 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 update_business_rule: 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.
update_business_rule 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 update_business_rule 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 update_business_rule. 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.
update_business_rule 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.
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