get_channel_info

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

With no annotations provided, the description carries the full behavioral burden. It clearly indicates a read-only lookup and lists accepted input formats, which is useful. However, it does not disclose error behavior, rate-limit or auth implications, or the exact shape/structure of the returned channel object.

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, front-loaded sentence that states the action, the key returned fields, and the accepted input forms. There is no filler or redundant restatement of the tool name.

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?

For a one-parameter tool this is nearly sufficient, but with no output schema and no annotations, the description should provide more context about the return format and possible failure modes. It lists fields but not how they are structured or what happens on invalid input.

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 coverage is 100% and the single 'url' parameter is already described as 'YouTube channel URL, @handle, or channel ID'. The description repeats this exactly rather than adding new semantic detail, so it earns the baseline score for high schema 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?

Uses a specific verb ('Get') and resource ('YouTube channel information'), then enumerates the concrete fields returned: title, description, counts, country, and thumbnail. The accepted identifier formats (URL, @handle, ID) further clarify scope and distinguish it from transcript/comment/playlist sibling tools.

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 explicit guidance on when to use this tool versus alternatives like get_channel_videos or get_video_metadata, and no exclusion criteria. The use case is implied by the name and field list, but the description never states when an agent should pick this over another tool.

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