Returns a list of Timestream for InfluxDB DB instances filtered by status (case-insensitive).
AI agents call LsInstancesByStatus to retrieve information from Prometheus 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 returns a filtered list of database instances. It performs a read-only operation with no side effects, no code execution, no data modification, and no destructive actions. The blast radius of misuse is minimal—an attacker gains visibility into instance status but cannot alter infrastructure or access sensitive data beyond metadata.
From the tool's definition Tool name 'LsInstancesByStatus' and description 'Returns a list of Timestream for InfluxDB DB instances filtered by status' indicate a query/list operation that retrieves data without modifying or deleting it.
Documented attack patterns abuse exactly the kind of access LsInstancesByStatus gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Prometheus MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for LsInstancesByStatus:
{
"version": "1",
"default": "deny",
"tools": {
"LsInstancesByStatus": {}
}
}LsInstancesByStatus is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Returns a list of Timestream for InfluxDB DB instances filtered by status (case-insensitive). It is categorised as a Read tool in the Prometheus MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Prometheus MCP Server MCP server in PolicyLayer and add a rule for LsInstancesByStatus: 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 Prometheus MCP Server. Nothing to install.
LsInstancesByStatus 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 LsInstancesByStatus 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 LsInstancesByStatus. 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.
LsInstancesByStatus is provided by the Prometheus MCP Server MCP server (awslabs.prometheus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Prometheus MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
805 Prometheus MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.