login_zhihu

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

The description discloses the key behavioral trait of opening a browser window and requiring manual intervention. It also mentions that other tools reuse the login state, indicating statefulness. No annotations exist to contradict this.

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 description is extremely concise with two sentences. It front-loads the purpose and then provides the critical behavioral detail. Every sentence adds value with no redundancy.

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 essential: purpose, behavior (popup, manual login), and impact on other tools. It lacks mention of error handling or failure scenarios, but given the simplicity of the tool (no params), it is mostly complete.

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?

There are no parameters in the input schema, and the description does not need to add parameter details. It implicitly communicates that no arguments are required, which is sufficient given the empty schema and 100% coverage.

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 the verb 'login' and the resource 'Zhihu account'. It distinguishes from sibling tools like login_xiaohongshu and reset_zhihu_login by specifying the platform and behavior.

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 explicitly mentions that calling this tool will open a browser window requiring manual login, and that successful login enables other tools. It does not explicitly state when not to use it, but the context of being a prerequisite for other Zhihu tools implies appropriate usage.

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