instagram-video-downloader

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

There are no annotations, so the description bears full responsibility for behavioral disclosure. It only says 'download' and does not explain what the tool returns (file vs URL), whether authentication or rate limits apply, how invalid links are handled, or any side effects beyond the core action.

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, direct sentence with no filler or repetition. Every word contributes to the meaning, and the essential information is front-loaded in an appropriately minimal way for a one-parameter tool.

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?

With only one parameter, no annotations, and no output schema, the definition is minimally viable: it names the action and the required input. However, it omits any description of the return value or behavior on error, which an agent would need to know to fully trust and use the result.

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 100%, with the url parameter already described as 'Instagram视频链接'. The description's mention of '根据视频链接' adds no new meaning beyond the schema, so the baseline of 3 applies; there is no additional parameter context to compensate.

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 verb ('下载' / download), a specific resource ('Instagram视频'), and the input type ('根据视频链接' / based on video link). It clearly distinguishes this tool from sibling downloaders such as tiktok-video-downloader and youtube-video-downloader by platform.

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 guidance is given about when to use this tool versus alternatives. The description does not mention exclusions, preconditions, or the conditions under which a user should choose instagram-video-downloader over a sibling downloader; the agent must infer this solely from the platform name.

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