List all available permissions that can be granted to users.
AI agents call list_available_permissions 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 only retrieves or queries available permissions metadata. It has no side effects, does not execute code, does not modify data, and does not delete anything. It is a straightforward read operation consistent with the Read category definition (search, list, get, fetch).
From the tool's definition Tool name 'list_available_permissions' and description 'List all available permissions' indicate a query operation that retrieves data about available permissions without modifying, executing, or deleting anything.
Documented attack patterns abuse exactly the kind of access list_available_permissions 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_available_permissions:
{
"version": "1",
"default": "deny",
"tools": {
"list_available_permissions": {}
}
}list_available_permissions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all available permissions that can be granted to users. 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_available_permissions: 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_available_permissions 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_available_permissions 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_available_permissions. 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_available_permissions 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.