Get APM performance metrics for applications including response time, throughput, error rate, and Apdex.
AI agents call get-apm-metrics to retrieve information from New Relic MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs passive data retrieval from New Relic's monitoring system. It queries existing application performance metrics and returns them for analysis. No data is created, modified, deleted, or executed. The information returned is monitoring/observability data that helps understand application behavior but does not trigger changes or execute code.
From the tool's definition Tool retrieves APM performance metrics (response time, throughput, error rate, Apdex) without modifying or executing operations. The verb 'Get' and the read-only nature of performance metric retrieval confirm this is a data query operation.
Attacks that exploit this kind of access
Get APM performance metrics for applications including response time, throughput, error rate, and Apdex. It is categorised as a Read tool in the New Relic MCP Server MCP Server, which means it retrieves data without modifying state.
Register the New Relic MCP Server MCP server in PolicyLayer and add a rule for get-apm-metrics: 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 New Relic MCP Server. Nothing to install.
get-apm-metrics 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 get-apm-metrics 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 get-apm-metrics. 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.
get-apm-metrics is provided by the New Relic MCP Server MCP server (xelber/newrelic-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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