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

Annotations already declare readOnlyHint=true, so the safety profile is covered. Beyond that the description only enumerates payload fields, which an output schema already supplies; it says nothing about whether entities are paginated or truncated, how the 'how many events have a chosen sound' count is scoped, or what happens for an unknown game_id.

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 with no filler, but the structure is a trailing parenthetical field dump rather than a front-loaded statement of action. It is compact without being informative; the space is spent re-listing output fields instead of stating purpose.

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 an output schema already present, restating returned fields is redundant, and the genuinely missing pieces — the required game_id, pagination/limits on the entity list, and failure behavior — are absent. For a lookup tool the description is not complete enough to call it correctly without opening the schema and guessing.

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% for the single required game_id, so the description must carry the burden — yet it never mentions the parameter, its format, or how to obtain a valid game id. The reader cannot tell whether an id, slug, or name is expected.

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 names the resource (a game's entities) and enumerates the fields it returns, so the subject matter is discernible. But it is a noun phrase with no verb — it never says 'retrieves' or 'gets a game plus its entities' — and it does not distinguish this from the sibling get_entity or list_games, leaving the agent to infer that this is the per-game aggregate lookup.

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?

There is no when-to-use guidance at all: no statement of when to call get_game versus get_entity or list_games, no prerequisite that the game must exist, and no indication of what a caller does with the returned page URLs. Usage is only implied by the field list.

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