Back up a volume snapshot

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

With no annotations provided, the description carries the full burden for behavioral disclosure, and it only states the core action. It does not disclose that this is a mutating operation that copies snapshot data into a backup target, that a backup target must likely be configured beforehand, or that Longhorn backup creation is typically asynchronous. The description at least conveys that a backup artifact is created, but critical operational context is missing.

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

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

A single front-loaded sentence naming the action and source resource, followed by a reference link, with zero filler. Every element earns its place, and the description is appropriately sized for the minimal content it conveys.

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

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

This is a moderately complex mutating tool (4 params including a nested labels object, a required but ambiguous 'name') with no annotations, no output schema, and an elaborate sibling ecosystem around backups and backup targets. The description does not clarify the required parameter, backupMode values, prerequisites such as an existing backup target, or operation timing. The external docs link partially mitigates the gaps but does not make the definition self-contained enough for reliable autonomous invocation.

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

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

Schema description coverage is 0%, so the description must compensate for undocumented parameters, and it barely does. The phrase 'from a volume snapshot' weakly hints that snapshotName identifies the source snapshot, but the required 'name' parameter is never explained: it is ambiguous whether it refers to a volume, a snapshot, or the resulting backup. labels and backupMode are entirely unexplained, leaving an agent to guess their accepted values and meaning.

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

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

The description 'Create a backup from a volume snapshot' uses a specific verb (create) plus a resource (backup derived from a snapshot), conveying the input-to-output relationship the bare name 'volume_snapshot_backup' does not. It is clearly distinguishable from siblings like volume_snapshot_create (creates snapshots, not backups) and backup_get/backup_list (read operations).

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

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

No explicit when-to-use or when-not-to-use guidance is given, and no alternative tools are referenced. Usage is only implied by the semantics: an agent can infer 'use this when you need to create a backup from a snapshot,' but nothing tells it to prefer this over volume_snapshot_create or how it relates to backuptarget/backupvolume tooling. The Longhorn docs link points to relevant material but is not in-description guidance.

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