browser_keyboard_up

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

With no annotations provided, the description carries the full burden. It only paraphrases the tool name without disclosing any additional behavior, side effects, or requirements (e.g., whether a key must have been pressed first).

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 a single concise sentence with no filler, earning every word. However, it is slightly terse and could be enriched with minimal usage hints without losing conciseness.

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 tool is simple, but the description lacks usage context, parameter semantics, and behavioral caveats. Given no annotations or output schema, it is incomplete for an agent to use confidently, especially with many sibling tools.

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 schema has one required 'key' parameter with no description and 0% schema coverage. The tool description does not mention the parameter or explain valid values (e.g., keyboard codes vs characters), leaving the agent without guidance.

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 '释放键盘按键' clearly states the action (release) and the resource (keyboard key). It is specific and distinguishes this tool from siblings like browser_keyboard_down, which performs the opposite action.

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 provides no guidance on when to use this tool, such as mentioning that it pairs with browser_keyboard_down or that it is for key combinations. There is no explicit context or alternative mention.

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