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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so safety is covered structurally. The description goes beyond them by disclosing the data provenance ('dates from publishers and platform holders'), that price is US-only and conditional ('where announced'), and that review data appears only 'for games already out'.

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?

One sentence, front-loaded with the primary purpose and with the default behavior placed at the end where it reads naturally. It is dense and slightly run-on in the middle clause, but every phrase carries information about the returned fields.

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 single optional-parameter read tool with full annotations and an output schema, the description covers scope, data sources, conditional fields, and default behavior. The only residual gap is the meaning of 'notable' — the curation rule behind which games appear — which is left 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 the month pattern and the list of months with releases are already documented. The description nonetheless adds value the schema lacks by stating that the parameter defaults to the current month, which an agent needs to know before deciding whether to pass an argument at all.

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 opens with a specific verb and resource, 'Notable video games releasing in a month,' and enumerates the payload (dates, platforms, US price, review recommendation share), so the agent knows exactly what comes back. It does not explicitly contrast itself with siblings like get_best_of_month or search_games, though the release-calendar framing is naturally distinct.

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 by 'Defaults to the current month,' which tells the agent the call works with no arguments, but there is no explicit when-to-use guidance nor any statement about when a sibling such as get_best_of_month or search_games would be the better choice.

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