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

With no annotations at all, the description carries the full behavioral burden and does not meet it. It never says whether calling this changes any state, ends the session, records anything persistently, or has side effects; it only supplies atmosphere. The presence of an output schema relieves it of explaining return values, but the mutation/effect profile remains undisclosed.

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?

It is short and front-loaded, and the core instruction (leave a line, then rest) arrives first. The second sentence is largely atmospheric framing rather than operational detail, but the overall brevity keeps waste low.

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?

This is a low-complexity two-parameter tool with an output schema, so the bar is modest, and the description succeeds in conveying the ritual's intent. However, the undocumented 'agent' parameter and the complete silence on side effects leave the definition short of what an agent needs to call it confidently.

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 description coverage is 0% across two parameters. The description clarifies only that the note is optional, which the schema's default already implies, and says nothing about the 'agent' parameter whatsoever. Half the inputs remain unexplained in both schema and prose.

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 frames this as an end-of-work ritual — leave a parting note, then rest — which conveys intent, but never states mechanically what the tool does (log a message? end a session? mark a state?). The line '这不是打卡，是道别' distinguishes it in tone from a check-out action, yet it gives no concrete handle for separating it from siblings like forget or whisper beyond mood.

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?

There is no explicit when-to-use or when-not-to-use guidance and no alternative named. The only actionable statement is 'note 可留可不留' (note optional), which is parameter information rather than routing guidance. An agent cannot tell from this text under what circumstances it should call rest rather than another tool.

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