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

Annotations already cover read-only and idempotent behavior, and the description adds meaningful aggregation semantics beyond them: a volume counts once in the month of its first English edition, and the default is the latest year with a report. These are important behavioral rules for interpreting results, though no return format or pagination details are given.

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 that begins with the tool's purpose and then enumerates the report contents without filler. It is dense but every clause contributes to understanding what the report includes, though readability could be slightly improved with sentence breaks.

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 explaining return content, and it does so by enumerating the statistics included. Parameters are fully covered by the schema, and annotations cover safety, leaving only minor gaps around exact response structure or formatting.

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%, so both parameters are already documented in the schema. The description reinforces the year/month behavior and the default year, but adds little syntax or format detail beyond what the schema provides, making 3 the appropriate baseline.

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 resource and output: aggregated English manga release statistics, including per-publisher volume counts, translation lag, fastest/slowest series, and completed series. It is clear what the tool does, though it does not explicitly name sibling tools like get_releases or get_new_licenses to distinguish when to use this report instead.

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 through the year/month parameters and the note that it defaults to the latest year, but there is no explicit guidance on when to choose this tool versus siblings such as get_releases or get_series. The description tells the agent what it returns, not when it should be selected over alternatives.

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