get_monthly_usage_summary

THE RISK

Low Risk

Why get_monthly_usage_summary needs a policy

This tool queries usage and cost data for reporting purposes. It retrieves information without creating, modifying, deleting, or executing any changes to infrastructure or financial transactions. The low severity reflects minimal blast radius—an AI agent misusing this tool could only over-request summaries, causing minor API overhead, but cannot damage infrastructure or incur unintended charges.

From the tool's definition Tool name 'get_monthly_usage_summary' and description 'Get monthly usage and cost summary' indicate data retrieval with no modification or side effects. The verb 'get' and 'summary' are typical Read operations.

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

POLICY

How to control get_monthly_usage_summary

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_monthly_usage_summary:

policy.json

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

get_monthly_usage_summary 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.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_monthly_usage_summary

What does the get_monthly_usage_summary tool do? +

Get monthly usage and cost summary. 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_monthly_usage_summary? +

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

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

Can I rate-limit get_monthly_usage_summary? +

Yes. Add a rate_limit block to the get_monthly_usage_summary 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_monthly_usage_summary completely? +

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

get_monthly_usage_summary 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 →