Get choice list values for a field
AI agents call choice_list to retrieve information from ServiceNow MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves predefined choice/dropdown values for a ServiceNow field—a straightforward data retrieval operation. It has no capability to modify, delete, or execute actions. The blast radius of misuse is minimal: at worst, an agent could retrieve choice list metadata that may already be visible in the UI. No destructive, financial, or irreversible consequences are possible.
From the tool's definition Tool name 'choice_list' and description 'Get choice list values for a field' indicate a retrieval operation with no side effects. The verb 'Get' explicitly signals a read-only query action.
Attacks that exploit this kind of access
Get choice list values for a field. It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for choice_list: 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.
choice_list 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 choice_list 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 choice_list. 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.
choice_list is provided by the ServiceNow MCP Server MCP server (schwarztim/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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