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tiancode
by tiancode

pve_snapshot_delete

Destructive

Permanently delete a snapshot of a VM or container. Requires confirmation and frees disk space.

Instructions

Delete a snapshot of a VM or container. DESTRUCTIVE.

    Applies to: QEMU VMs and LXC containers, located by ``vmid`` (``node``
    optional and auto-resolved). Requires ``confirm=true``: the snapshot
    ``name`` is removed permanently and can no longer be rolled back to.

    Side effects: frees the snapshot's disk space; the guest keeps running
    unaffected. Waits up to PVE_MCP_TASK_WAIT seconds; returns JSON with
    ``vmid``/``node``/``type``/``snapshot`` and ``task``.
    Source: DELETE /nodes/{node}/{qemu|lxc}/{vmid}/snapshot/{name}.
    

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
nodeNo
vmidYes
confirmNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior5/5

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

Beyond the destructiveHint annotation, the description details side effects (frees disk space, guest unaffected), permanence (no rollback), wait behavior, and return fields. This fully informs the agent about the tool's behavior.

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

Conciseness5/5

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

The description is concise, front-loaded with purpose and destructiveness, followed by details and source. Every sentence adds value with no redundancy.

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

Completeness5/5

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

Given the presence of an output schema (implied by return JSON description), the tool is fully specified: all parameters explained, side effects covered, waiting behavior noted. No gaps remain for an agent to guess.

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

Parameters5/5

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

Despite 0% schema description coverage, the description explains all 4 parameters: name (snapshot to delete), vmid (integer), node (optional auto-resolved), and confirm (must be true). It adds critical context that the schema lacks.

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 the action ('Delete a snapshot of a VM or container') and the resource (snapshot). It distinguishes from sibling tools like pve_snapshot_create and pve_snapshot_rollback by focusing on deletion, making the purpose unambiguous.

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

Usage Guidelines4/5

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

The description provides explicit usage constraints: requires confirm=true, applies to QEMU VMs and LXC containers, node is optional and auto-resolved. It does not explicitly say when not to use it, but the context is clear enough for an agent to decide.

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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