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

With no annotations supplied, the description bears the full behavioral burden and does little: it does not state that this is a read-only listing, whether results are paginated or bounded, how many samples exist, or whether items are stable/cached. The parenthetical about not needing an upload is the sole behavioral disclosure.

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?

One short clause with zero padding, and the most useful information (no upload required, the fields available) is up front. It is telegraphic to the point of missing a verb, but no sentence is wasted.

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 no-param, no-output-schema tool, the description does the important job of enumerating returned fields (ids, titles, sizes, download URLs), which partly substitutes for the missing output schema. It still leaves open result volume and ordering, which an agent needs in order to decide whether to page or filter client-side.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline for a 0-param tool applies. The space instead goes to naming return fields, which is a reasonable use of it.

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 fragment 'Precomputed real outputs (no upload needed)' plus a field list conveys what data comes back, but it never states the action — that this enumerates all available samples — and the verb is only implied by the name and by 'ids'. It is closer to a return-value blurb than a statement of purpose, and only weakly separates it from get_sample.

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 upload needed' is the only usage hint, and it is a prerequisite note rather than when-to-use guidance. Nothing tells the agent to call this instead of get_sample when it wants a single sample, or when enumerating the catalog is appropriate.

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