get_login_qrcode

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

With no annotations, the description must carry the disclosure burden. It does reveal the key outputs (Base64 PNG and session Token) and the 'real-time' nature, but it does not disclose possible side effects such as whether previous QR codes/tokens are invalidted, whether the token expires, or whether authentication is required before other tools. This is adequate but incomplete.

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?

A single sentence that front-loads the action and outcome with no redundant words. Every part, including the output types (Base64 PNG and session Token), contributes useful information, making it concise and well structured.

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?

Given zero parameters and no output schema, the description sufficiently explains the return values (QR code image in Base64 and a session token). It does not explain the surrounding login flow, such as how the token should be used or whether the QR code must be polled, which would make it fully complete, but it covers the core call 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?

The input schema has 0 parameters and 100% coverage, so there is nothing for the description to add about parameters. With no parameters, the baseline is 4 and the description appropriately focuses on outputs rather than inputs.

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 (获取/get), a clear resource (登录二维码数据源/QR code source and 会话 Token/session token), and distinguishes itself from the sibling novel-management tools. An agent can immediately know this is the login-entry tool, separate from list_novels or publish_chapter.

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 the tool is for login via '扫码登录', and the sibling list shows no other login tool, so usage context is somewhat clear. However, it never explicitly says when to use it (e.g., before other authenticated calls) or mentions any exclusions/alternatives. The guidance is implied, not stated.

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