startall_node
Start all VMs and containers on a node (respecting boot order).
This record as markdown: /tools/gethosthewalrus-proxmox-mcp/startall-node.md
What startall_node does on Proxmox MCP Server
AI agents invoke startall_node to trigger actions in Proxmox MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why startall_node is rated High
This tool executes a command that initiates multiple guest systems. While not destructive or financial, it is an Execute-category operation because it triggers external infrastructure operations with side effects that cannot be rolled back simply by re-running the tool. The severity is high because unintended activation of all VMs on a node could disrupt services, consume resources, and affect system availability.
From the tool's definition Tool description states it 'Start all VMs and containers on a node' — this is an action that triggers external operations (starting multiple virtual machines and containers) whose effects depend on which node is targeted.
Attacks that exploit this kind of access
The rule that runs startall_node safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Proxmox MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For startall_node, this is the rule to start with:
startall_node stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Proxmox MCP Server, apply this rule, and every startall_node call is checked against it from then on.
Questions about startall_node
Start all VMs and containers on a node (respecting boot order). It is categorised as a Execute tool in the Proxmox MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for startall_node: 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.
startall_node is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the startall_node 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 startall_node. 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.
startall_node is provided by the Proxmox MCP Server MCP server (gethosthewalrus/proxmox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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