List HTTP methods (functions) defined within a REST Message
AI agents call list_rest_message_functions 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 displays information about HTTP methods configured in ServiceNow REST Messages—a non-destructive read operation. While the broader ServiceNow server provides access to incidents, changes, and other critical systems, this specific tool merely enumerates function definitions without triggering execution, creating data, or causing side effects.
From the tool's definition Tool name 'list_rest_message_functions' and description 'List HTTP methods (functions) defined within a REST Message' indicate a retrieval/query operation that returns metadata about REST endpoints without modifying or executing them.
Attacks that exploit this kind of access
List HTTP methods (functions) defined within a REST Message. 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_rest_message_functions: 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_rest_message_functions 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_rest_message_functions 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_rest_message_functions. 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_rest_message_functions 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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