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

Annotations already cover read-only/idempotent/non-destructive, and the description adds auth-conditional behavior (logged-in responses include liked/isMine) plus an explicit data caveat ('勿假定有评论'), i.e. no comment payload. That is meaningful context beyond the annotations, though return shape is only sketched.

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 compact and front-loads the core scope before the routing/chain notes, with no filler. However the telegraphic semicolon-and-bracket style packs several distinct ideas into one run-on, which slightly hurts scannability.

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?

For a one-parameter read tool with no output schema, the description covers returned content, auth variation, sibling disambiguation, and follow-on actions. It could still say more about pagination or the exact association payload, but nothing critical to correct invocation 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 coverage is 100% and already documents the single 'id' parameter as a cuid. The description's moment-ID warning is more of a routing rule than added parameter semantics, so it does not meaningfully extend what the schema already says.

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?

States the resource clearly (official post body/images/associations) and names the sibling it must not be confused with (get_moment for moment IDs). No explicit verb, but the scope and returned fields make the purpose unambiguous against siblings like get_moment and list_posts.

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?

Gives an explicit exclusion ('动态ID另用get_moment，勿混用') and routes the moment-reply case to comment_moment, plus outlines a chain (list_posts→详情→关联活动/产品). Missing only an explicit statement of when to prefer this over list_posts other than the chain hint.

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