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

Substantial behavior beyond the annotations: login is required, invalid cursor returns 400, a profileVersion change returns 409 and requires re-reading the anchor rather than retrying with the same params. It also discloses cost (per-page LLM spend) and semantic traps (an empty 'warming' result is not 'no members'; total=null means unknown, not page size). This is exactly the extra context annotations cannot carry.

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?

Very dense and front-loaded, with the login requirement and the core paging contract first, then error handling and semantic caveats. Each bracketed clause carries distinct information, though the teletype-style packing of error codes and caveats into one block costs some readability.

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, yet the description still explains the return-relevant pitfalls (total=null, empty warming, supply none/gated/warming) and the correct recovery path for 409. For a paginated read tool with full schema coverage, nothing an agent needs to call it correctly is missing.

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 100%, so the schema already documents all six params and their formats, making 3 the baseline. The description adds meaning on top by tying cursor to its signed, pass-through semantics and by linking the requirement to the anchor's groupId/direction/profileVersion, plus the failure modes tied to cursor/version.

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 title and description state a specific verb+resource: paginate the members of one chain link (环), keyed by the groupId/direction returned from get_chain_anchor. It is clearly distinguishable from neighbors like get_chain_anchor and get_creator, though the Chinese shorthand makes the core purpose slightly less immediately parseable than an explicit 'list members of one chain node' sentence.

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 real usage context: paginate the groupId/direction/profileVersion you got from get_chain_anchor, then hand off to get_creator, and it warns against exhaustively enumerating pages because each page costs LLM. It does not name a competing tool to use instead, but the sequencing and the explicit 'don't enumerate everything' guidance leave little to infer.

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