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washyu
by washyu

create_proxmox_vm

Create a new virtual machine on a Proxmox node with custom CPU, memory, disk, and ISO attachment. Specify node, VM ID, name, and host to provision.

Instructions

Create a new VM (QEMU) on Proxmox

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nodeYesNode name
vmidYesVM ID (must be unique)
nameYesVM name
memoryNoRAM in MB
coresNoNumber of CPU cores
disk_sizeNoDisk size in GB
storageNoStorage for diskslocal-lvm
socketsNoNumber of CPU sockets
isoNoISO image to attach (e.g., 'local:iso/debian-12.iso')
cdromNoCD-ROM device (e.g., 'local:iso/debian-12.iso'). Alternative to iso — use one or the other.
net0NoNetwork device configuration (default: 'virtio,bridge=vmbr0')virtio,bridge=vmbr0
ostypeNoOS type for optimization (default: 'l26' for Linux 2.6+)l26
startNoStart VM after creation
hostYesProxmox host. Any node hostname covered by your registered credential (per-node) or cluster-scope token. Register with `homelab-mcp credentials add --type proxmox <host> <username>`, or `... --scope cluster:<name> <token_id>` for cluster tokens.
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations are all false, offering no safety guarantees. The description merely states 'Create' but fails to disclose potential side effects like overwriting existing VMs, required permissions, or creation duration. As the sole bearer of behavioral info, it is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence. It is concise but could benefit from additional context without becoming verbose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 14 parameters, no output schema, and the complexity of VM creation, the description is too sparse. It omits return values, confirmation, error handling, and post-creation behavior.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Input schema covers all 14 parameters with descriptions. The description adds no additional semantic value beyond the schema, so baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it creates a new VM on Proxmox using the verb 'Create' and specifies the resource 'VM (QEMU)'. This distinguishes it from sibling tools like clone_proxmox_vm or delete_proxmox_vm.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives like clone_proxmox_vm or how to handle existing VMs with the same vmid. No prerequisites or context are provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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