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

描述补充了登录要求（需要登录）和整组替换的行为（虽schema也有），还解释了下游影响（驱动个性化排序），超越了annotations提供的idempotent/openWorld等信息，无矛盾。

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?

两个段落，核心信息前置，使用加粗和分隔符清晰区分重点，无冗余，每句都有价值。

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?

简单设置器，schema和annotations已覆盖安全和参数，描述补充了登录、替换语义和使用场景，未遗漏调用所需信息。

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描述覆盖率100%，interests和freeText的参数含义已完整说明（包括整组替换、最多20个等），描述未额外增加参数语义，符合高覆盖率的基线3分。

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?

明确说明设置当前用户的兴趣标签和可选自由描述，用于计算兴趣向量驱动个性化推荐，并明确区分于set_my_match_preference和set_notification_prefs，动词+资源+用途清晰。

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?

明确指明用途是调整推荐流排序，并显式排除破冰介绍和推送开关，提供替代工具的区分条件，'别搞混'强调使用边界。

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