Youtube.Channel.Get

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

With no annotations, the description carries the full burden, and it does disclose the returned fields (snippet, statistics, uploads-playlist id), which is real added value. However it says nothing about auth/quota cost, behavior on an unknown or malformed channel_id, or whether all fields are returned in one request.

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 dense sentence with no filler, and the resource and returned payload are front-loaded. It is efficient, though the parenthetical API note adds little for an agent that only needs invocation guidance.

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 need not be explained, but the description omits parameter format and failure behavior for a tool with no annotations. Minimum viable, with visible gaps an agent would hit at call time.

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 with 0% schema description coverage, so the description should compensate. It implies the argument identifies a channel but never states the expected format (e.g. 'UC...' ID vs handle/username) or that it is mandatory, leaving a real gap for a single-param tool.

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?

States a specific verb ('Get') and resource ('a channel') and names the exact payload returned (snippet/statistics + uploads-playlist id), plus the underlying 'Data API v3' surface. It does not differentiate itself from siblings like youtube.videos.list or youtube.analytics.query, but the resource is unambiguous.

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 when-to-use, when-not-to-use, or alternative routing is given; the agent must infer from the name that this is the lookup to call when it already has a channel identifier. There is nothing telling it whether to prefer this over youtube.analytics.query for channel-level metrics.

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