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

Annotations already indicate read-only and idempotent. The description adds useful behavioral details: pagination by after_id and the default ±30-day date window when no filter is provided. No contradictions with annotations.

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?

Two concise sentences, front-loaded with the core action. Every clause adds value: scope, pagination, default window, and prerequisite. Zero waste.

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 a full output schema and rich annotations, the description doesn't need to detail return format or safety. It covers core behavior, pagination, defaults, and the player_id prerequisite, making it complete for the tool's complexity.

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 descriptions cover 100% of parameters, including player_id origin and after_id cursor semantics. The description reiterates these but doesn't add substantially new parameter-level information beyond connecting the pagination flow.

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 clearly states it lists a player's events, with 'player's' distinguishing it from broader event tools. The parenthetical (schedule/results) and pagination mention add specificity. This is a specific verb+resource+scope, meeting the top criteria.

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?

Provides clear context: it's for retrieving a specific player's events, and instructs to resolve player_id via search_players first. However, it does not explicitly contrast with alternative event-listing tools like list_events or query_events, so it lacks explicit exclusions or alternatives.

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