Get the cheapest available plan.
AI agents call get_cheapest_plan to retrieve information from Vultr MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves pricing information about available plans. It performs no side effects, does not create resources, execute commands, delete data, or involve financial transactions. It is a straightforward read operation querying plan data from Vultr's infrastructure. The low severity reflects the minimal blast radius—an AI agent misusing this tool could only retrieve information, not cause harm.
From the tool's definition Tool name 'get_cheapest_plan' and description 'Get the cheapest available plan' indicate a retrieval operation that queries available pricing/plan information without modifying or creating resources.
Documented attack patterns abuse exactly the kind of access get_cheapest_plan gives an agent:
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_cheapest_plan:
{
"version": "1",
"default": "deny",
"tools": {
"get_cheapest_plan": {}
}
}get_cheapest_plan is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the cheapest available plan. It is categorised as a Read tool in the Vultr MCP MCP Server, which means it retrieves data without modifying state.
Register the Vultr MCP server in PolicyLayer and add a rule for get_cheapest_plan: 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.
get_cheapest_plan 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 get_cheapest_plan 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 get_cheapest_plan. 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.
get_cheapest_plan 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.
Start from Vultr MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
284 Vultr MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.