export_thumbnail_set

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It reveals a center-of-interval sampling rule, but does not state whether the operation is read-only, whether it writes files, or what it returns. The word 'export' hints at side effects, but this is left ambiguous.

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 a single efficient sentence with no filler or redundant information. However, it is so terse that it omits usage details an agent would need.

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 3-parameter tool with no annotations, no output schema, and no parameter descriptions, this is incomplete. The core operation is intelligible, but return format, side effects, and parameter meanings are all absent.

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?

With 0% schema description coverage and no parameter information in the description, none of 'input', 'count', or 'width' are given meaningful semantics. The schema supplies only types, defaults, and bounds, so an agent cannot infer whether 'count' means number of thumbnails or number of intervals.

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 gives a concrete verb ('extract') and resource ('a set of thumbnails'), and adds a distinctive sampling rule ('one at the centre of each interval'), so an agent can differentiate it from a single-thumbnail tool. It stops short of explicitly distinguishing it from siblings like export_gif or media_extract_frames.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention when to choose it over media_thumbnail, media_extract_frames, or export_gif, and it never clarifies the source media or context in which intervals apply.

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