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

With no annotations, the description carries the full burden and discharges it: it discloses the single human-gated step (crypto checkout_url), the auth model (one account, reusable token), that common errors come with fixes, that limits are documented, and the conditional behavior of `you_are_here` (only populated when authenticated). It also documents the cross-tool contract that every response carries `next_steps` and every error carries `error.fix`/`error.next` — information an agent cannot get from structured fields.

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?

Front-loaded with the directive 'Call this FIRST', which is the highest-value information. The middle is one dense, dash-chained sentence, and the closing 'Requires: nothing. Call this first.' repeats the opening — mild redundancy, but each content clause adds a distinct fact.

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, so the description must describe the return payload — and it does, naming the tool ordering, checkout URL, auth rules, error fixes, limits, and `you_are_here` fields. For a zero-parameter entry-point tool with no annotations, nothing an agent needs to call it correctly is missing.

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?

Zero parameters, so there is nothing to disambiguate and the baseline is 4. The description correctly makes no parameter claims, avoiding noise.

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 concrete verb and resource ('Returns the whole flow in one response') and enumerates what the payload contains: tool ordering for VPS rental and sandbox code execution, the crypto checkout step, auth rules, error fixes, limits, and the `you_are_here` block. No sibling tool in the list does anything comparable, so it is trivially distinguishable.

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?

'Call this FIRST' is stated up front and repeated, and 'Requires: nothing' removes any prerequisite ambiguity. The alternative path is implicit but unambiguous: this is the entry point, and every other tool is what you call afterwards.

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