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

The annotations only declare readOnlyHint=true, but the description adds auth requirements, ordering (newest first), page size (10), the unread-on-first-page rule, pagination-to-null behavior, and a prompt-injection guard about excerpt content. These are meaningful behavioral details beyond the annotations, and they are consistent with readOnlyHint.

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 compact, front-loaded block with no filler: auth, scope, ordering, pagination, safety and alternative routing each appear once and in a usable order.

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 covers what the notices represent, the unread marker, pagination termination, and the safety caveat about excerpt data. Nothing material is missing for an agent to call it correctly.

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 the single cursor parameter is already documented, but the description still adds the operational rule of passing nextCursor back verbatim and continuing until null. That goes beyond the schema text and is directly useful.

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 a specific verb and resource (lists likes/comments/replies on one's own moments) and narrows scope with '本人动态', making it clearly distinct from siblings such as list_my_notifications, list_moments_feed and get_moment.

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?

Explicitly routes the agent: use get_moment for context, use comment_moment with replyToCommentId to reply, and pass nextCursor back unchanged until null. It also states the login prerequisite and that the operation is read-only and does not mark items read.

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