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

Annotations already declare this a safe read-only, closed-world call, so the bar is lower. The description still contributes real behavioral context the annotations cannot: the data is an archived snapshot, carries source_updated_at/freshness signals, and may not reflect the currently registered squad — a material caveat for an agent reasoning about staleness.

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 compact sentences: purpose first, then the ID-provenance prerequisite, then the freshness caveat. Nothing is padded, though the dependency on another tool's search mode is slightly compressed into a dense clause that could be easier to parse.

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?

There is no output schema, so an agent gets no picture of the return shape — presumably a player list, but the description never says what a squad record contains or how pagination resolves. The freshness caveat partially compensates. The definition is workable but incomplete for a tool whose result structure is entirely undisclosed.

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 0%, so the description must carry the load. It does explain the most important parameter, team_id, as a squad-team ID obtained via a source=squad search, which is meaning the bare 'string' schema lacks. But limit and cursor are never mentioned, and neither is pagination behavior, leaving two of three parameters undocumented.

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 a specific verb and resource ('读取存档球员阵容') and qualifies it as archived rather than live data ('不保证是当前注册阵容'), which implicitly distinguishes it from the current-availability sibling. It stops short of naming the sibling it differs from, so the agent must infer the boundary itself.

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?

It gives one concrete prerequisite: the ID must come from a search with source=squad yielding a squad-team ID. That is useful routing guidance. However, it never states when to prefer this over get_team_availability, nor an explicit when-not-to-use condition despite hinting that data may be stale.

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