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

No annotations, so the description carries the full burden; it does disclose the return payload fields (人數, 開始時間 in Taiwan time, 玩法與語音, 報名連結), which is genuinely useful given there is no output schema. However it omits whether this is a read-only listing, whether results are refreshed/cached, pagination, or any rate limit.

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?

It is a single compact sentence, which is efficient, but the bracketed prefix is noise rather than information and sits before the useful content. The useful scoping detail is not front-loaded.

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 no annotations and no output schema, the description does the right thing by enumerating returned fields, giving minimal viable context. It still fails to state the operation type (list vs. lookup), result ordering/filters, or how it differs from games__open_game_trades, leaving meaningful gaps.

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 coverage is 50%: 'game' has a description, but the 'platform' enum is undocumented. The description lists 遊戲 and 平台 ambiguously as returned fields rather than explicitly as filter inputs, so it only loosely compensates for the enum gap. Baseline 3 is appropriate.

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 core resource is discernible: open Taiwan-player game LFG (揪團) postings, with the fields it surfaces (game, platform, headcount, start time, playstyle/voice, sign-up link). But the leading bracketed string '［NEW遊戲發售預告片揪團交換］' reads like keyword stuffing and blurs the actual purpose, and it never states the verb (list/fetch postings). Distinguishable from games__list_games but not from games__open_game_trades.

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?

No when-to-use guidance, no prerequisites, and no mention of the near-identical sibling games__open_game_trades. An agent gets no help deciding between the two LFG-ish tools or knowing what conditions belong here.

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