list_r2_buckets

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

No annotations are provided, so the description carries the behavioral disclosure burden. The verb 'List' makes the read-only nature clear and 'in an account' establishes account scoping, but pagination, ordering, response shape, and permission caveats are not mentioned. This is a minimal, non-misleading disclosure rather than a rich one.

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?

The description is a single front-loaded sentence with no filler. Every word contributes meaning, and the length is appropriate for a tool with one required parameter and a straightforward list operation.

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 simple one-parameter list tool, the core selection and invocation information is present. However, with no output schema and no annotations, the description leaves the return format and pagination behavior unspecified, making it adequate but not complete enough for a higher score.

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 account_id is already documented as 'The account ID', so the baseline is 3. The description's phrase 'in an account' loosely reinforces the parameter's role but adds no additional semantics such as accepted formats, ownership details, or validation behavior.

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 uses a specific verb ('List') and a clear resource ('R2 storage buckets') with explicit scope ('in an account'). It distinguishes this tool from sibling R2 tools like list_r2_pipelines and list_r2_catalogs by naming the resource type, though it does not explicitly call out alternatives.

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 implies when to use the tool: when you need to enumerate an account's R2 storage buckets. However, it provides no explicit guidance about when not to use it, no comparison to sibling list tools, and no prerequisites such as required permissions or auth scopes.

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