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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds two useful facts beyond that: the clip is public and the call costs 1 credit. It says nothing about failure behavior for private/deleted clips or the cache_max_age effect on freshness.

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?

Three short sentences, front-loaded with the resource and then the payload. The leading 'Clip.' fragment merely restates the title and is the only wasted token in an otherwise tight definition.

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 no output schema, listing the returned fields is genuinely valuable and largely fills that gap. However, the undocumented cache_max_age parameter and the absence of any when-to-use framing leave the definition short of complete for a two-parameter fetch tool in a crowded platform-sibling set.

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 description mentions no parameters at all. The url parameter is well documented in the schema including accepted formats, but cache_max_age has no description anywhere (50% coverage), and the description does not compensate by explaining what that cache window controls.

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?

Names a specific resource (a public Kick clip) and enumerates what the record contains (title, creator, channel, duration, view count, media URL), so an agent knows this is a single-clip lookup. It never contrasts with the obvious sibling twitch_clip or the various *_search tools, so platform routing is left to the name alone.

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 statement of when to use this versus twitch_clip or a platform search tool, and no prerequisites or exclusions. The only decision-relevant hint is the cost line, which tells the agent to weigh a credit against the call but not when the call is appropriate.

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