get_kubernetes_available_upgrades

THE RISK

Low Risk

Why get_kubernetes_available_upgrades needs a policy

This tool queries and retrieves upgrade availability information for a Kubernetes cluster. It has no side effects—it does not execute upgrades, modify cluster configuration, delete resources, or perform any destructive or financial actions.

From the tool's definition Tool name 'get_kubernetes_available_upgrades' and description 'Get available Kubernetes version upgrades for a cluster' indicate a read-only query operation that retrieves information about available upgrades without modifying any cluster state or…

Documented attack patterns abuse exactly the kind of access get_kubernetes_available_upgrades gives an agent:

POLICY

How to control get_kubernetes_available_upgrades

PolicyLayer is an MCP gateway — it sits between your AI agents and Vultr MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_kubernetes_available_upgrades:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_kubernetes_available_upgrades": {}
  }
}

get_kubernetes_available_upgrades is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Vultr MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
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FAQ

Questions about get_kubernetes_available_upgrades

What does the get_kubernetes_available_upgrades tool do? +

Get available Kubernetes version upgrades for a cluster. It is categorised as a Read tool in the Vultr MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_kubernetes_available_upgrades? +

Register the Vultr MCP server in PolicyLayer and add a rule for get_kubernetes_available_upgrades: 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 Vultr MCP. Nothing to install.

What risk level is get_kubernetes_available_upgrades? +

get_kubernetes_available_upgrades is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_kubernetes_available_upgrades? +

Yes. Add a rate_limit block to the get_kubernetes_available_upgrades 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.

How do I block get_kubernetes_available_upgrades completely? +

Set action: deny in the PolicyLayer policy for get_kubernetes_available_upgrades. 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.

What MCP server provides get_kubernetes_available_upgrades? +

get_kubernetes_available_upgrades is provided by the Vultr MCP server (rsp2k/mcp-vultr). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Vultr MCP tool call.

Start from Vultr MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →