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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description usefully adds result-scope limits (only 5 videos, not the paginated collection, not full deep analysis), but says nothing about brandId behavior, auth requirements, or result format beyond the field list.

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-loaded with the core purpose, followed by the one non-obvious parameter toggle and two boundaries. Four sentences with little waste, though the trailing exclusions slightly overlap the scope already stated in sentence one.

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 no output schema, the description carries the return-value burden and does so concretely (profile, summary, accounts, top-5 videos). The remaining gap is parameter meaning for brandId/creatorId across a 3-param, 0%-coverage schema.

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 0%, so the description must compensate. It does explain includeVideos ('false omits videos'), but brandId and creatorId get no semantics at all, and the interaction between brandId and the 'brand content language' summary is left implicit.

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+resource and enumerates the payload (profile, brand-language summary, accounts, 5 most-viewed videos), so the agent knows exactly what comes back. It implicitly distinguishes itself from list_creator_videos and deep-analysis siblings via the exclusion sentence, but never names those alternatives, so it falls short of a 5.

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?

The closing sentence gives negative scoping ('Does not return the complete paginated video collection or full deep analysis'), which hints the agent should reach for a sibling in those cases. However, no sibling is named and there is no positive when-to-use statement, so usage is only implied.

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