List all available entity types in NewRelic. Returns domain/type combinations like APM/APPLICATION, INFRA/HOST, BROWSER/APPLICATION, etc.
AI agents call list_entity_types to retrieve information from NewRelic MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates metadata about available entity types without querying production data, modifying any state, executing code, or performing destructive operations. It is a straightforward Read operation.
From the tool's definition Tool 'list_entity_types' with description 'List all available entity types in NewRelic. Returns domain/type combinations.' - this is a listing/enumeration operation with no modification or execution of external actions.
Attacks that exploit this kind of access
List all available entity types in NewRelic. Returns domain/type combinations like APM/APPLICATION, INFRA/HOST, BROWSER/APPLICATION, etc. It is categorised as a Read tool in the NewRelic MCP Server MCP Server, which means it retrieves data without modifying state.
Register the NewRelic MCP Server MCP server in PolicyLayer and add a rule for list_entity_types: 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 NewRelic MCP Server. Nothing to install.
list_entity_types 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_entity_types 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_entity_types. 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_entity_types is provided by the NewRelic MCP Server MCP server (ruminaider/newrelic-mcp-server). 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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