List applications grouped by categories/vendors.
AI agents call list_application_categories 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 performs a query/list operation to retrieve metadata about application categories and vendors. It returns informational data without modifying, executing code, deleting resources, or initiating financial transactions. The 'list' action is characteristic of a Read category tool with minimal risk if misused by an AI agent.
From the tool's definition Tool name 'list_application_categories' and description 'List applications grouped by categories/vendors' indicate a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_application_categories 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 list_application_categories:
{
"version": "1",
"default": "deny",
"tools": {
"list_application_categories": {}
}
}list_application_categories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List applications grouped by categories/vendors. 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 list_application_categories: 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.
list_application_categories 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_application_categories 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_application_categories. 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_application_categories 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.
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284 Vultr MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.