login_xiaohongshu

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

With no annotations, the description effectively discloses key behaviors: browser popup, manual QR scan, time estimate (10-30 sec), timeout (5 min), and effect on future searches. No mention of error handling or session persistence, but core behavior is well covered.

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?

Three sentences, no redundancy. Each sentence adds unique value: action, process, timing, and outcome. Efficient and front-loaded.

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?

The description covers the login flow comprehensively given no parameters and an output schema. It explains the user interaction and consequences. Slightly lacking detail on return value (handled by output schema) and preconditions, but minor.

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?

The input schema has zero parameters with 100% coverage, so baseline 4 applies. The description adds no parameter documentation but none is needed; it focuses on behavioral context.

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 clearly states '登录小红书账号' (login to Xiaohongshu account), a specific verb and resource. It distinguishes from siblings like login_zhihu (different platform) and reset_xiaohongshu_login (different action). Detailed process (browser popup, QR scan) adds precision.

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?

The description implies usage before searches ('后续搜索调用将使用新的登录态') but does not explicitly state when to use or not use this tool vs alternatives. No prerequisites (e.g., app required) mentioned. Sibling reset_xiaohongshu_login is present but not contrasted.

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