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

Annotations already declare read-only, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds real context beyond that: it says it returns a description and a link to the game page, and that the id typically comes from another tool (chaining signal).

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?

Three tight sentences, front-loaded with the trigger condition, with zero filler. Each sentence contributes: when to use it, what it accepts, and what it returns.

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?

An output schema exists so return values need no further explanation, annotations cover the safety profile, and 100% schema coverage handles the parameters. The description supplies exactly the missing pieces: trigger context and input provenance.

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 the game and locale parameters are fully documented in the schema, including the locale enum. The description adds only the chaining hint ('id returned by another tool'), which is marginally useful but largely restates the schema's 'Game id ... or title'.

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 ('Get game details' for 'one specific PadConsole game') and enumerates the attributes it answers about (player count, genre, cross-home play). The emphasis on a single specific game implicitly and clearly separates it from search_games and recommend_games, which deal with sets of games.

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?

Explicitly frames the trigger condition ('Use this when someone asks about one specific PadConsole game...') and notes that the input is an id from another tool or a title, which tells the agent how to obtain the argument. It stops short of naming a sibling alternative or stating when not to use it.

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