ListMetrics
AI agents call ListMetrics to retrieve information from Awslabs Valkey without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
ListMetrics typically queries or retrieves metric metadata/definitions from CloudWatch or similar monitoring services. This is a read-only operation with no side effects. Confidence is moderate (0.7) rather than high because the description is empty, creating some uncertainty about actual implementation details.
From the tool's definition Tool named 'ListMetrics' with no description provided. Based on naming convention and context as an AWS monitoring tool, it retrieves metrics data without modifying state.
Attacks that exploit this kind of access
ListMetrics. It is categorised as a Read tool in the Awslabs Valkey MCP Server, which means it retrieves data without modifying state.
Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for ListMetrics: 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 Awslabs Valkey. Nothing to install.
ListMetrics 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 ListMetrics 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 ListMetrics. 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.
ListMetrics is provided by the Awslabs Valkey MCP server (awslabs.valkey-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.