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

Annotations already establish this as a read-only, non-destructive, non-open-world operation, and the description adds useful behavioral context: results are read at one Wanchain block, Express includes quote/rate/WAN balance and payment capacity, XFlows includes vesting periods, and the response includes exact approve and sell calls. It does not cover auth or rate limits, but it meaningfully supplements the annotations.

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?

The description is front-loaded with the core purpose and packs route, vesting, and returned-call details efficiently. It is somewhat dense and grammatically knotty, but each sentence contributes useful information and there is little obvious waste.

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?

There is no output schema, so the description carries the burden of explaining return content, and it does so by naming quotes, rates, WAN balance, payment capacity, vesting schedules, and exact approve/sell calls. It is complete enough for a read-only one-parameter tool, though amount formatting remains underspecified.

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%, and the only parameter is amount. The description clarifies that amount is an xWAN amount being converted, but it does not specify units, formatting, decimal handling, or whether the value is human-readable versus raw. This is minimally adequate but leaves a meaningful gap for the sole parameter.

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 states a specific resource and outcome: the WAN amount an xWAN amount converts into by each route, read at one Wanchain block. It distinguishes the Express route from XFlows vesting routes, though the phrasing is a dense noun phrase rather than a direct verb-led purpose statement.

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?

It implies this tool is for comparing conversion routes and explicitly says no route is recommended, leaving the choice to the owner. It also notes that the wanchain-xwan-express skill covers selling, but it does not give a clear when-to-use/when-not-to-use rule or name an alternative tool for route comparison.

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