YouTube Channel

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

Annotations already establish readOnly, openWorld, and non-destructive behavior, so the safety profile is covered. The description adds that calls route through the Decodo Web Scraping API with a named target and return parsed JSON, but says nothing about failure modes, rate limits, pagination, or default value for limit.

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?

Two sentences, front-loaded with the operation and payload, followed by a docs link that does not crowd out the essential text. No filler, though the docs URL is somewhat take-it-or-leave-it.

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 only two parameters, annotations covering the safety profile, and no output schema, the description supplies what an agent needs: the input identity form, the source API, and the JSON return shape. It lacks detail on the video object fields and whether limit has a default.

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 both 'query' (handle/ID) and 'limit' are documented by the schema itself. The description's 'by handle or ID' merely restates the schema and adds no syntax or constraint detail beyond it, which is the expected baseline.

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 and resource ('Fetch the videos of a YouTube channel by handle or ID') and clarifies the return ('parsed as JSON'). The channel-scoped resource distinguishes it from youtube_search and youtube_metadata implicitly, but no sibling is named explicitly.

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?

'Use it to list what a channel has published' gives a clear positive usage context that no sibling covers as cleanly. There are no exclusions or explicit pointers to alternatives such as youtube_metadata for single-video lookups.

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