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

No annotations are provided, so the description carries the full behavioral burden. It discloses the domain scope and which fields appear, implying a read-only listing, but says nothing about result limits, pagination, ordering, or whether an unknown filter yields an empty set or an error.

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?

A single front-loaded sentence that leads with the domain label and then the contents and filters. No filler, though packing the field list and filter list together makes it slightly dense.

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 5-parameter tool with no annotations and no output schema, the description covers scope and most filters but omits the 'upcoming' parameter and any return-value or ordering expectations, leaving real gaps for an agent to guess at.

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 0%, so the description must compensate. It loosely maps to platform, status, and date (from/to) filters, but leaves the 'upcoming' boolean unexplained and gives no date format or enum-value guidance, so coverage remains partial.

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 clear verb (list) and resource (games) with explicit scope (2026–2027 titles across PS5/Xbox/PC/Switch 2/mobile) and the fields returned (announcement date, release date, status). It does not distinguish itself from near siblings like games__get_game, games__lookup_any_game, or games__release_calendar, so it stops 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 notes the tool supports filtering by platform, status, and date, which implies when it is useful (browsing a filtered set), but it never names an alternative or a when-not-to-use condition against the many sibling lookup/calendar/countdown tools.

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