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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered; the description adds real value beyond that with the 62-day maximum window, the UTC-based default range, and the month-precision overlap rule for volumes dated only to a month. It does not discuss pagination or result-size limits, keeping it short of a 5.

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?

Two sentences, both dense with actionable specifics: scope and returned fields first, then defaults and the edge-case rule. No filler or restated title.

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 compensates by enumerating the returned fields and explaining the month-only volume behavior. The 62-day limit and defaults round out what an agent needs, though result ordering and volume of results are unstated.

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 both date parameters and their defaults are already documented in the schema. The description reinforces the default window and adds the 62-day cap constraint, which is meaningful but marginal beyond the schema 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?

States a specific verb and resource ('The English manga volumes Mangainfo lists') plus the entity fields returned (series, volume, edition, publisher, ISBN, date). This clearly distinguishes it from siblings like get_new_licenses or get_series_volumes, which cover different resource types.

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?

Gives a concrete default window ('next 7 days from today (UTC)') and a hard cap, which implies typical usage, but never states when to prefer this over siblings such as get_new_licenses or get_series_volumes, nor any exclusion conditions. Usage is inferable rather than explicit.

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