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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new behavioral context: what a brand composes (identity, products, audience, style) and the meaning of the ready flag plus its explanatory note, which is valuable given there is no output schema.

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?

Three short sentences, front-loaded with the identifying verb and resource, then resource semantics. No filler and nothing repeated from the schema or annotations.

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 burden of describing results and does so for brand fields and the ready/note distinction. It omits that the response is paginated with a nextCursor envelope, a minor gap given the schema hints at cursor-following.

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% and the single page object documents limit (1-50), cursor, and the instruction to follow nextCursor. The description adds nothing about pagination, 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?

States a specific verb and resource with explicit scope: 'Lists the Fuzzbucket brands owned by the signed-in user.' The second sentence defines what a brand contains, which disambiguates it from get-style siblings like fuzz_get_brand by making clear this is an enumerating view of the whole brand collection, though the sibling is never named.

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?

Usage is implied rather than stated: 'Brands with ready=true can be used for creative work' tells the agent what to do with results, but there is no explicit routing guidance such as when to call this versus fuzz_get_brand or fuzz_get_brand_quota, and no exclusions.

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