Create firecracker snapshot

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

Annotations cover the safety profile (readOnly=false, destructive=false), but the description adds distinctive context the annotations cannot convey: a free window followed by per-GB billing until automatic expiry, plus auth requirements (services:manage and a full-access API key). It stops short of describing reversibility or the response payload, but it substantially enriches the operational picture.

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?

Purpose is front-loaded and the billing/lifecycle context follows logically; every sentence earns its place. Minor awkwardness in 'stop keep billing early' slightly hurts readability, but the density is justified for a tool with billing implications.

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?

No output schema exists, and the description compensates by explaining the billing lifecycle, expiry semantics, auth prerequisites, and the recommended cleanup step. Combined with 100% schema coverage, an agent has enough to call it correctly, though it does not say explicitly that the snapshot ID must be captured from an external source.

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 100%, so both orderNo and description are fully documented in the schema (including pattern, length, and examples). The description adds no parameter-level detail, so the baseline 3 is appropriate.

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?

States a specific verb and resource ('Create a temporary snapshot of a Firecracker VPS'), and the 'Firecracker' qualifier distinguishes it from the generic create_snapshot sibling. An agent can route correctly without opening the schema.

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?

Gives explicit when-to-use ('before any risky or automated change'), the follow-up action ('delete it once the change succeeds'), and a referral to list_firecracker_snapshots for the exact policy. This is precisely the decision guidance an agent needs.

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