List Access Control rules (ACLs) — who can read/write/create/delete records (requires SCRIPTING_ENABLED=true)
AI agents call list_acls to retrieve information from ServiceNow-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries ACL configuration data (who can read/write/create/delete records), which is a read operation. However, severity is 'high' rather than 'low' because ACL data is security-sensitive information; an AI agent that leaks or misuses this intelligence could facilitate unauthorized access by revealing permission boundaries. The SCRIPTING_ENABLED requirement adds sensitivity.
From the tool's definition Tool name is 'list_acls' and description states 'List Access Control rules' — the verb 'List' and the action of retrieving ACL information indicate data retrieval with no modification.
Attacks that exploit this kind of access
List Access Control rules (ACLs) — who can read/write/create/delete records (requires SCRIPTING_ENABLED=true). It is categorised as a Read tool in the ServiceNow-MCP MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow- MCP server in PolicyLayer and add a rule for list_acls: 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.
list_acls is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_acls 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 list_acls. 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.
list_acls 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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