AI agents call describe-serverless-caches to retrieve information from Amazon EKS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'describe' prefix in AWS CLI/API terminology consistently indicates retrieval of resource metadata and configuration. There is no indication of write, execute, delete, or financial operations. The empty description reduces confidence slightly, but the verb pattern is a strong signal. Blast radius of misuse is minimal—returning cache information poses low risk.
From the tool's definition Tool name 'describe-serverless-caches' uses the 'describe' verb, which conventionally retrieves information about AWS resources without modification. No description provided, but naming pattern strongly suggests read-only query operation.
Documented attack patterns abuse exactly the kind of access describe-serverless-caches gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Amazon EKS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for describe-serverless-caches:
{
"version": "1",
"default": "deny",
"tools": {
"describe-serverless-caches": {}
}
}describe-serverless-caches is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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describe-serverless-caches. It is categorised as a Read tool in the Amazon EKS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon EKS MCP Server MCP server in PolicyLayer and add a rule for describe-serverless-caches: 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 Amazon EKS MCP Server. Nothing to install.
describe-serverless-caches 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 describe-serverless-caches 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 describe-serverless-caches. 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.
describe-serverless-caches is provided by the Amazon EKS MCP Server MCP server (awslabs.eks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Amazon EKS MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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