list_cluster_tiers

List all available tiers for a specific Object Storage cluster.

SERVERVultr MCP SOURCErsp2k/mcp-vultr

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/rsp2k-mcp-vultr/list-cluster-tiers.md

WHAT IT DOES

What list_cluster_tiers does on Vultr MCP

AI agents call list_cluster_tiers to retrieve information from Vultr MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_cluster_tiers is rated Low

This tool retrieves and queries available tier information for Object Storage clusters. It performs a read-only operation that retrieves data without modifying, deleting, or executing any infrastructure changes. The blast radius of misuse is minimal—an agent could only waste time or enumerate cluster configurations, posing no risk to data integrity or system state.

From the tool's definition Tool name 'list_cluster_tiers' and description 'List all available tiers for a specific Object Storage cluster' indicate a retrieval operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_cluster_tiers safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Vultr MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_cluster_tiers, this is the rule to start with:

list_cluster_tiers Allowed

list_cluster_tiers is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Vultr MCP, apply this rule, and every list_cluster_tiers call is checked against it from then on.

FAQ

Questions about list_cluster_tiers

What does the list_cluster_tiers tool do? +

List all available tiers for a specific Object Storage 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 list_cluster_tiers? +

Register the Vultr MCP server in PolicyLayer and add a rule for list_cluster_tiers: 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 list_cluster_tiers? +

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

Can I rate-limit list_cluster_tiers? +

Yes. Add a rate_limit block to the list_cluster_tiers 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 list_cluster_tiers completely? +

Set action: deny in the PolicyLayer policy for list_cluster_tiers. 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 list_cluster_tiers? +

list_cluster_tiers 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.

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