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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and a closed-world scope, so the safety profile is covered. The description only adds the word 'public' plus the decision-support framing; it says nothing about auth, rate limits, or failure behavior when a slug is unknown.

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; every word contributes to scope and timing. Nothing is redundant.

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 one parameter, no output schema, and rich annotations, the description is adequate for the safe-read profile but leaves the key input unexplained. An agent must infer from the name that 'slug' selects the game, which is a meaningful gap for a required identifier.

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% and the description never mentions the single 'slug' parameter, what it identifies, or how to obtain it. The regex pattern in the schema constrains format but not meaning, so the description fails to compensate for the coverage gap.

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+resource: 'Read public game rules', which tells the agent this is a read of game metadata/rules keyed off a game. However, it does not distinguish itself from adjacent siblings like exact_game_version or browse_store, and 'rules' is narrower than the tool name 'game_details' implies.

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?

'before deciding whether to play' gives explicit situational context for when to call this tool, i.e., as a pre-play evaluation step. It names no alternative tool and gives no exclusions, so it stops short of the top score.

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