Click elements in a collaborative browser via visible text, row:N, or CSS selector to interact with search results and page content, notifying the user before performing the action.
在协作浏览器中点击目标。target 支持三种写法：
可见文本（默认）：如"南传佛教"（点中文本所在元素/链接）
row:N：搜索结果列表第 N 条（N 从 1 起，自动点标题链接）
css:选择器：任意 CSS 选择器
注意：点击会真实发生在用户可见的窗口里，操作前应先告知用户。
| Name | Required | Description | Default |
|---|---|---|---|
| index | No | 标签页序号；不传则操作用户当前页 | |
| target | Yes | 点击目标：可见文本 / row:N / css:选择器 |
Changes observed during successful MCP inspections.
v0.2.1Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
明确告知点击会真实发生在用户可见窗口，并提醒操作前应告知用户，体现了对副作用和用户可见影响的披露。由于没有 annotations，描述承担了全部责任，虽未提及可能引发的后续变化（如跳转、提交），但已含关键行为提示。
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?
描述简洁紧凑，使用条理化的列表说明目标写法，没有冗余信息。必要注意事项以一句独立警示句呈现，整体结构清晰。
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?
对于完成点击操作，描述覆盖了目标指定的所有方式、参数默认行为以及用户可见性警示。由于没有输出 schema，无需额外说明返回值。信息完整，足以指导代理正确调用。
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?
两个参数均有描述，schema 覆盖 100%。描述额外详细解释了 target 的三种语法格式及其含义，并说明 index 的默认行为（不传则操作当前页），远超 schema 本身提供的信息。
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?
明确说明工具功能：在协作浏览器中点击目标（
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?
提供了目标书写格式（文本、row:N、CSS）和操作前的注意事项，但没有明确提及何时应使用本工具而非其他协作浏览器操作工具（如切换、读取、输入等）。缺少显式的替代方案区分。
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.