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NolanLT

Local Browser MCP

by NolanLT

browser_click

Click elements on a local browser page by providing a CSS selector or a snapshot reference from browser_snapshot. Enables AI agents to perform precise clicks for automated web interactions.

Instructions

Click an element by CSS selector or by a ref from browser_snapshot.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
refNo
selectorNo
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It only describes how to identify the element, but discloses no behavior such as waiting, error handling, side effects, or return values. For an interaction tool, this is a significant gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

One concise sentence, front-loaded with the verb and resource, with no filler. Efficiently communicates the core function.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple click tool with only two optional parameters and no output schema, the description is minimally adequate. However, it leaves open questions about return values, waiting behavior, and failure handling, which are relevant in a browser automation context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description explicitly explains the meaning of both parameters ('CSS selector' and 'ref from browser_snapshot'), compensating for the 0% schema description coverage. However, it does not clarify precedence or exclusivity between the two parameters.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Click an element') and specifies two identification methods (CSS selector or ref from browser_snapshot), distinguishing it from sibling tools like browser_hover and browser_fill.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It implies clear usage context for clicking an element, but does not explicitly mention when not to use it or compare with alternatives. The context is evident enough for an agent to decide.

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

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