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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds some return-content context by naming analyses, saved clip count, and transcript/chapter availability, but it does not explain error behavior, missing-video handling, or response format.

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 concise sentence, so it is not bloated. However, it is not front-loaded with a clear action verb and reads as an object description rather than a tool instruction.

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?

This is a simple read-only tool with rich annotations and no output schema, and the description does mention several returned fields. Still, it omits the core operation wording and says nothing about the required youtubeVideoId parameter, leaving clear gaps for an agent selecting and invoking it.

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?

There is one required parameter, youtubeVideoId, with 0% schema description coverage, and the description does not mention it at all. It fails to explain the identifier's expected format or source, leaving the schema's bare string type to carry the full burden.

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 names the resource and lists some returned fields, so an agent can infer it retrieves a video's details. However, it is a noun phrase rather than an action statement and does not clearly distinguish this tool from siblings like list_videos, get_transcript, or get_chapters.

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?

The description provides no guidance on when to use get_video versus alternatives such as get_transcript, get_chapters, get_analysis, or list_videos. It only implies retrieval by naming the resource.

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