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

Annotations already declare the non-read-only, non-idempotent, open-world profile, so the description's job is to add context, and it does: it discloses an asynchronous side effect (translation is enqueued, not completed) and the locale fallback to the tenant default, neither of which appears in the schema or annotations. Gaps remain around duplicate-name behavior and what the enqueued translation implies for follow-up calls.

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 primary action and immediately followed by the side effect and default behavior. No filler, no repetition of the title or parameter types.

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 an output schema present, return values need no explanation, and annotations cover the safety profile, so the remaining obligations are behavioral and they are mostly met (async translation, locale default). Non-idempotency and the consequence of a duplicate cluster name are the notable omissions.

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 100%, so the baseline is 3, and the description earns the extra point by documenting the runtime default for locale (tenant's default when omitted), which the schema does not state. The 'Requires a name' clause simply restates the required array and adds nothing.

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?

Uses a specific verb and resource ('Create a new topic cluster') and adds a second concrete effect (enqueue AI-assisted translation), which clearly separates it from read siblings like get_cluster and list_clusters. It does not explicitly name a sibling or state how it relates to trigger_generation, but the intent is unambiguous.

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 description says what the tool does but never states when to reach for it instead of alternatives, whether the name must be unique (especially relevant given idempotentHint=false), whether the translation enqueue is optional or skippable, or what prerequisites exist. Only the bare requirement 'Requires a name' is offered as guidance.

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