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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds real value beyond that: it discloses the order lifecycle (a 'done' state with a result link) and that the call is free, which matters for polling. It does not say what states exist or what happens for an unknown/expired id.

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?

Extremely short and front-loaded: the resource and returned fields come first, followed by the cost note. The telegraphic 'An order by its id:' fragment is slightly clipped but every clause conveys information; 'Free.' earns its place.

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?

For a single-parameter read tool with no output schema, the description usefully enumerates the return content (state, reviewer score, result link), which is the main thing missing from structured fields. Remaining gaps are minor: the id format and error behavior for missing orders.

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 carry the parameter meaning, but 'by its id' merely restates the parameter name 'order_id'. The schema's id pattern (^lo_[A-Za-z0-9_-]{8,40}$) is never explained, and no format or validity guidance is given.

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 names the resource ('an order'), the lookup key ('by its id'), and the returned fields ('its state, the reviewer score, and the result link'). That is specific enough to separate it from the listed siblings (about, make_image, make_video), though the verb is only implied rather than stated.

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?

Usage is implied rather than stated: fetching by id and the mention of 'the result link once it is done' suggests checking or polling order progress. There are no explicit when-to-use/when-not-to-use rules or named alternatives, and 'Free' hints at cost-free polling but is not framed as guidance.

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