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

Annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds useful context by naming what data is returned for the game, but says nothing about failure modes (invalid/missing game) or any rate/permission constraints.

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 with no filler; the purpose is stated first and the returned fields follow. It could arguably trim the field enumeration, but nothing is wasteful enough to penalize heavily.

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 one-parameter read tool with full schema coverage and annotations covering safety, the description is nearly sufficient, and its listing of returned fields partially compensates for the absent output schema. Only the lack of error/edge-case guidance keeps it from being fully complete.

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 schema itself documents the 'game' parameter as a game id or remix.gg/g/ slug with length bounds. The description adds no syntax, format, or lookup detail beyond 'one game,' so it does not extend meaning past the schema; baseline 3 applies.

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 clear verb and resource — describing/retrieving a single game — and enumerates the content returned (creator, genres, device, creator's description). The phrase 'one game' implicitly distinguishes it from the list-oriented siblings (search_games, top_games), but it never names those siblings explicitly.

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 'use this to describe one game,' which frames it as a single-item lookup, but there is no explicit when-to-use/when-not guidance, no mention of the alternative list tools, and no prerequisites such as needing a valid slug or id.

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