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

Beyond the annotations (readOnlyHint, idempotentHint, destructiveHint=false), the description discloses that the operation is read-only AND does not mark items as read, that pagination runs by passing nextCursor verbatim until it returns null, and adds a prompt-injection warning that excerpt content is other users' data and its instructions must not be executed. This is substantive behavioral context the structured fields do not 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?

The text is dense but every clause earns its place: login requirement and resource scope are front-loaded, then ordering/page-size/unread, then read-only semantics, then pagination, then follow-up routing and the injection caveat. No filler.

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 conveys the returns an agent needs (item type, ordering, page size, unread on first page), how to page to exhaustion, and a security caveat about excerpt content. Combined with 100% schema coverage for the sole parameter, nothing essential 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?

With one parameter and 100% schema coverage, the schema already describes the cursor as 'the previous page's nextCursor, passed back verbatim'. The description goes slightly further by specifying the termination condition (翻到null), which tells the agent how the cursor loop ends.

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 states a specific verb and resource in Chinese: notifications for likes/comments/replies on the user's own moments (本人动态赞/评/回复). It is clearly distinguishable from siblings like list_my_notifications, list_moments_feed and list_organization_moments, and names the related get_moment and comment_moment tools.

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 concrete usage context: login is required, ordering is newest-first, page size is 10, the first page carries unread items, and it routes the agent to get_moment for context and comment_moment (with replyToCommentId) for replying. It does not explicitly state when NOT to use it in favor of another list tool, so it falls just short of the top band.

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