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

Annotations already declare destructiveHint=true, openWorldHint=true, and non-idempotent, so the safety profile is covered. The description adds that this 'submits a Builder task' (implying an asynchronous task submission rather than an inline result), but it does not disclose how the task's results are later retrieved or any rate/permission constraints. With annotations carrying the mutation profile, a 3 is appropriate.

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?

Front-loads the trigger conditions, which is good, but the sentence is a keyword-stuffed list that repeats near-synonyms ('个人资料' / '频道资料' / '频道信息' / '用户信息') without adding meaning. It is reasonably sized but several phrases do not earn their place.

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 task-submission tool with no output schema and destructive annotations, the description explains the submission step but omits the task lifecycle: it never tells the agent that results are fetched afterwards (e.g. via the scraper_task_status/scraper_task_result siblings). That is a meaningful omission for correct end-to-end use, leaving the definition only minimally complete.

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 every parameter (url, keyword, spider_id, file_name, page_turning) is already fully documented in the schema. The description only echoes the two spider_id modes and adds no syntax, format, or mutual-exclusion detail beyond what the schema provides, so the baseline 3 applies.

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 states a specific verb+resource: submit a YouTube profile collection Builder task, and names its two concrete modes (youtube_profiles_by-keyword, youtube_profiles_by-url). It distinguishes itself from video/comment/audio YouTube siblings by scoping to profiles/channels. It stops short of explicitly contrasting with non-YouTube profile scrapers like instagram_profiles or tiktok_profiles.

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?

It lists trigger phrases (profile/channel info combined with collect/scrape/extract verbs) which implies when to use it, and pins the two spider_id modes. However there is no when-not guidance and no explicit routing against the many sibling tools; usage is left for the agent to infer.

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