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

The annotations already establish that this is a read-only, idempotent, non-destructive, closed-world operation. The description adds useful domain context about what the feed tracks, but it does not describe response shape, ordering, freshness, or pagination behavior beyond what the schema already says. With annotations covering the safety profile, this is adequate but not rich.

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 wasted wording. It efficiently combines the action, resource, and tracked domain, though it could be slightly more structured by separating purpose from scope.

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?

There is no output schema, and the description does not explain what a change-feed entry contains, how results are ordered, or what consumers should expect. Annotations and the schema cover safety and parameters well, so the definition is usable, but the missing return-value context leaves a meaningful gap.

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%, and the schema itself documents page, limit, and since with defaults and constraints. The description adds no extra parameter-level meaning, such as what a dataset version represents or how since interacts with 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?

The description states a specific verb and resource: retrieve the CBAM Data dataset change feed. It also scopes the feed to amendments and updates to Annex I scope and default emissions benchmarks, which makes the purpose clear. It does not explicitly distinguish this from sibling tools such as cbam_status or cbam_scope, 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 description implies the tool is used to track dataset amendments and updates, giving a reasonable contextual signal for when to use it. However, it never states when not to use it or names an alternative sibling tool for related tasks, so usage guidance remains implied rather than explicit.

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