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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered, but the description adds nothing on top: no mention of pagination limits (the 10000 page*page_size cap in the schema), result caps, or data freshness/hydration semantics. With annotations carrying the safety profile, this description contributes no additional behavioral context.

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 short sentence with no padding and the resource stated immediately. It is efficient, though the brevity reflects under-specification rather than disciplined trimming.

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 22-parameter dataset search with a facets sibling and an item sibling, one bare sentence is not enough. The output schema excuses it from explaining return values, but nothing explains dataset coverage, record shape, the relationship to facets/item, or the practical limits an agent must respect when paging.

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% across all 22 parameters, so the schema fully documents q, sort, region, numeric range filters, and boolean availability flags. The description adds no parameter meaning beyond the schema, which is the baseline 3 case.

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 sentence names a verb (search) and a resource (YouTube creators dataset), but it is essentially a restatement of the tool name 'datasets_youtube_creators_search' and says nothing about scope, coverage, or how it differs from siblings like datasets_youtube_creators_facets, datasets_youtube_creators_item, or the generic datasets_creators_search. An agent can infer the general intent but gets no discriminating detail.

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 the sibling facets or item tools, nor versus the near-identical datasets_creators_search. No prerequisites, no exclusions, no indication of what queries it suits best.

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