AI agents use create_vm to create or update resources in Vcenter — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Vcenter environment.
This tool creates a new VM, which is a write operation that modifies the infrastructure state. While creation is technically reversible (via delete_vm), the act itself is a Write operation that allocates resources and establishes a new entity.
From the tool's definition Tool name 'create_vm' and description 'Create a VM that network boots first' indicate irreversible creation of a virtual machine resource.
Attacks that exploit this kind of access
Create a VM that network boots first. It is categorised as a Write tool in the Vcenter MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Vcenter MCP server in PolicyLayer and add a rule for create_vm: 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 Vcenter. Nothing to install.
create_vm is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_vm 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 create_vm. 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.
create_vm is provided by the Vcenter MCP server (michaelrice/vcenter-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
create_vm is one line of Vcenter's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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