List all virtual machines (QEMU/KVM) on a node or cluster-wide
AI agents call list_vms to retrieve information from Proxmox MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries information about virtual machines without creating, modifying, deleting, or executing any operations. It is a straightforward read-only operation that falls cleanly into the Read category. Severity is low because listing VMs may expose infrastructure information but does not enable direct harmful actions on those resources.
From the tool's definition Tool name is 'list_vms' and description states 'List all virtual machines (QEMU/KVM) on a node or cluster-wide'. The verb 'list' indicates a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List all virtual machines (QEMU/KVM) on a node or cluster-wide. It is categorised as a Read tool in the Proxmox MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for list_vms: 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 Proxmox MCP Server. Nothing to install.
list_vms 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_vms 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_vms. 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_vms is provided by the Proxmox MCP Server MCP server (ry-ops/proxmox-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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