get_channel_overview

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

With no annotations provided, the description carries the full burden. It discloses that it works for public channels (implying limitations) and specifies supported URL formats, but doesn't mention rate limits, authentication needs, error handling, or response format. It adds some context but lacks comprehensive behavioral details.

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 two sentences, front-loaded with the core purpose and key data points, followed by parameter specifics. Every sentence adds value without redundancy, making it efficient and well-structured.

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?

Given no annotations and no output schema, the description adequately covers the tool's purpose and parameter, but lacks details on return values, error cases, or performance traits. For a simple read operation with one parameter, it's minimally complete but could be more informative about behavioral aspects.

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%, so the schema already documents the channel_url parameter with its description and supported formats. The description repeats the URL format info but doesn't add meaning beyond what the schema provides, such as examples of valid handles or channel IDs, meeting the baseline for high coverage.

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 clearly states the verb ('Returns') and resource ('a flat overview of a public YouTube channel'), specifying what data is included (subscriber count, total views, total videos, creation date). It distinguishes from siblings like get_channel_videos (which lists videos) or get_engagement_stats (which might provide deeper analytics).

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 implies usage by specifying it returns a 'flat overview' and works for 'public YouTube channel', but doesn't explicitly state when to use this vs. alternatives like get_channel_videos or get_engagement_stats. No exclusions or prerequisites are mentioned, leaving some ambiguity about context.

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