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

Annotations already declare this is a read-only, non-open-world operation, so the safety profile is covered. The description adds useful output context by enumerating the fields returned (previous value, changes, release time, next release), but it does not describe authentication needs, error behavior, or rate limits.

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 tightly packed sentence with zero filler. It front-loads the core resource and then lists the returned data fields, making it easy to scan.

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 read-only tool, the description is almost complete: it identifies the resource, names the required input indirectly, and enumerates return contents even though there is no output schema. It stops short of explaining how to discover valid series IDs or what happens on invalid input, which keeps it from a 5.

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 parameter series_id already includes concrete examples. The description only implies that a series identifier is required via 'of a series' and adds no syntax, format, or validation detail beyond the schema. Baseline 3 is appropriate.

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 clearly identifies the resource and scope: the latest print for a single series, including previous value, changes, release timing, and next release. It is distinguishable from macro_history by the word 'latest', but it does not explicitly name or differentiate itself from close siblings like macro_latest_releases.

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 use when the latest observation for one series is needed, but it gives no explicit guidance on when to choose this over macro_latest_releases, macro_history, or macro_search_series. There are no stated exclusions, prerequisites, or alternative-routing instructions.

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