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

With no annotations provided, the description carries full responsibility for disclosing behavioral traits. It offers no information about whether the tool mutates data, requires authentication, handles errors, paginates, or returns specific data shapes. The word 'YouTube' discloses nothing beyond the platform.

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 extremely under-specified rather than concise. A single word does not convey necessary information, and there is no structure or development to aid understanding. It saves space but at the cost of usefulness.

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 tool with no annotations, no output schema, and minimal description, the context is severely incomplete. The agent cannot determine what this tool does, what it returns, or how it fits with the extensive list of sibling scrapecreators tools. The description is wholly inadequate for selecting and invoking the tool correctly.

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?

Although the description itself provides no parameter information, the input schema covers all three parameters (url, handle, channelId) with descriptions. Per the rubric, high schema coverage yields a baseline of 3. The redundant parameter descriptions are somewhat confusing but still document the fields adequately.

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 is simply 'YouTube', which merely restates the platform in the tool name. It does not state what the tool does (e.g., scrape channel data, videos, or profile info), so the purpose is entirely unclear and fails to distinguish it from numerous other scrapecreators_* tool variants.

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?

There is no guidance on when to use this tool versus alternatives like scrapecreators_channel_videos, scrapecreators_video_info, or scrapecreators_basic_profile. The minimal description gives no context about appropriate use cases, prerequisites, or exclusions.

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