tool_check_csdn_login

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

With no annotations, the description carries the full burden and does well: it discloses that a browser is launched, that headless is the default, that www.csdn.net is loaded with the saved storage state, and it enumerates the return keys. It omits cost/latency expectations and what happens if no saved session exists, but the operational picture is largely clear.

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 purpose is front-loaded in the first sentence, followed by mechanism, then Args/Returns blocks. Every sentence earns its place and nothing is padded.

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?

No output schema exists, so the description supplies the return dict shape {ok, logged_in, needs_login, saved_session, message}, and it covers the single parameter and the side effect of launching a browser. Nothing needed to call it correctly is missing.

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 0%, but the tool has only one optional parameter, and the description explains it: 'headless: Run headless (default True for a quick check)', adding the rationale of speed that the bare boolean schema does not convey.

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?

States a specific verb+resource: checking whether the saved CSDN session is still logged in. It further distinguishes itself from siblings by naming publish_csdn as the operation it guards, so an agent can place it correctly without opening the schema.

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 explicit when-to-use guidance: 'Call this before publish_csdn to avoid a failed publish due to an expired session.' It stops short of naming tool_csdn_login as the remedy when needs_login is true, but the return key 'needs_login' points there.

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