List Kubernetes custom resource definitions
AI agents call list-crds to retrieve information from Kubernetes MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a query operation to list custom resource definitions, which is a non-mutating Kubernetes API call. It has no side effects, does not execute arbitrary code, does not modify resources, and does not delete anything. The blast radius of misuse is minimal—an agent could only enumerate what CRDs exist in the cluster, which is informational and low-risk.
From the tool's definition Tool name 'list-crds' and description 'List Kubernetes custom resource definitions' indicate a read-only operation that retrieves and enumerates existing CRD metadata without modifying state.
Attacks that exploit this kind of access
List Kubernetes custom resource definitions. It is categorised as a Read tool in the Kubernetes MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Kubernetes MCP Server MCP server in PolicyLayer and add a rule for list-crds: 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 Kubernetes MCP Server. Nothing to install.
list-crds 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-crds 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-crds. 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-crds is provided by the Kubernetes MCP Server MCP server (thekaranpargaie/kube-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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