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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety/networking profile. The description adds useful context that only public metadata is returned and enumerates the fields, but says nothing about auth needs, URL format constraints, or error behavior.

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?

A single tight sentence with no filler, and the key information (what entity, what fields) is front-loaded. It is efficient, though extremely terse for a detail 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?

An output schema exists, so return values needn't be explained, and the description reasonably covers the entity type and returned field set. The main gap is the undocumented 'url' parameter and the absence of any routing hint against the sibling list tool, which leaves an agent with an incomplete picture of how to use it correctly.

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 single 'url' parameter carries no schema description. The description only implies the input is a Sky News video URL ('One Sky News video's') without stating the expected URL shape, canonical form, or whether it must be a Sky News domain URL, so it fails to compensate for the coverage gap.

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 clear resource ('One Sky News video') and what it returns ('public metadata'), distinguishing it from the plural skynews_videos list tool by naming a single item. However, it never explicitly contrasts itself with skynews_videos, so the differentiation is only implied by the singular 'one'.

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 when-to-use guidance and no mention of the sibling skynews_videos or skynews_article. An agent must infer that this is the detail-fetch tool for a single video versus the listing tool.

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