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

The single annotation (destructiveHint=false) says almost nothing, and the description more than compensates: it discloses the notification side effect on assignment, the auth requirement, the absence of a durable idempotency key, and an explicit no-auto-retry protocol (re-read current state instead). That is exactly the operational context annotations cannot convey.

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?

Dense but front-loaded: auth, then the create/assign semantics, then the retry hazard and verification tool. Every clause is actionable; only the retry guidance repeats the same idea twice (结果不明或超时 / 不要自动重发).

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?

With no output schema and only a weak annotation, the description covers auth, side effects, idempotency and post-call verification. It never says what a successful call returns (e.g. the task id), which is why it points to get_collaboration_goal rather than stating the result shape.

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 only 20% (only dueAt is documented), so the description must carry the load, and it explains the least obvious parameter: assigneeId omitted means self, otherwise it must be a goal collaborator (and triggers a notification). goalId/title/detail are left to their names and maxLength constraints.

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?

Names a specific verb+resource and scope: create a task inside a collaboration goal (独行录目标中创建任务), plus assignment behavior. It does not distinguish this from the very similar siblings create_collaboration_tasks (plural, batch) or create_direct_collaboration_task, so an agent must infer which one to use from name alone.

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 concrete preconditions (login required; only call after the user authorizes assigning to that person; assignee must already be a collaborator of the goal) and names a companion tool to run before and after (get_collaboration_goal). It lacks any explicit when-not or comparison against the plural/bulk siblings.

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