player_last_season_rewards

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

With no annotations provided, the description carries the full burden. It discloses important behavioral traits: null fields may appear, nulls do not indicate zero earnings, and the tool was only tested on one account and one season. However, it does not address potential error cases, authentication requirements, or rate limits. The provided caveats are valuable but not comprehensive, leaving gaps in expected behavior.

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?

The description starts with the primary purpose in the first sentence, then adds focused technical caveats. It is reasonably concise with no filler, although some details about observed nulls could be seen as slightly verbose. The front-loading is effective and each sentence adds value.

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?

Given the simple schema (one string param) and no output schema, the description provides useful context about the response shape and null handling. However, it omits details about the exact 'season_reward_info' structure (e.g., list of formats) and does not specify any limitations beyond lack of equivalence testing. It is adequate but not thorough enough to fully prepare an agent without additional schema info.

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?

The schema has 0% description coverage and the description adds almost no meaning to the 'username' parameter beyond its name. It says 'for one account' but never directly links it to the username parameter or explains the expected format (e.g., player name vs. ID). This leaves the agent without additional context to correctly populate the parameter.

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 a specific verb ('Return'), a specific resource ('previous season's glint totals for one account'), and the route ('GET /players/last_season_rewards'). It distinguishes itself from the current-season route by explicitly saying it's a separate route with no tested equivalence, making it clear this tool targets a different time period than sibling tools like player_current_rewards.

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?

The description implicitly indicates usage for previous season data and warns against assuming equivalence with the current-season route, but does not explicitly state when to use this tool over alternatives. It lacks explicit 'use this when...' guidance or contrast with other player-related tools. The statement about being a separate route is a hint but not a full usage guideline.

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