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pansin

Browser MCP Server

by pansin

browser-console

Navigate to web pages and capture browser console output with real-time streaming, allowing developers to monitor JavaScript errors, logs, and debug information during automation.

Instructions

Navigate to a URL and capture console output from the browser with streaming support

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesThe URL to navigate to
timeoutNoTimeout in milliseconds (default: 30000)
waitForNoCSS selector or text to wait for before capturing console (optional)
commandsNoBrowser commands to execute (e.g., "click .button wait 2s") (optional)
streamNoWhether to stream console output in real-time (default: true)
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 of behavioral disclosure. It mentions 'streaming support' and implies navigation and capture actions, but doesn't describe what happens during execution (e.g., browser launch, page load behavior, error handling, or output format). For a tool with 5 parameters and no annotations, this leaves significant gaps in understanding its behavior.

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?

The description is a single, efficient sentence that front-loads the core purpose. It avoids redundancy and wastes no words, making it highly concise and well-structured for quick understanding.

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

Completeness2/5

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

Given the tool's complexity (5 parameters, no annotations, no output schema), the description is incomplete. It lacks details on behavioral traits, output format, error conditions, and differentiation from the sibling tool. Without annotations or output schema, the description should provide more context to compensate, but it doesn't.

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

Parameters3/5

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

Schema description coverage is 100%, so the schema fully documents all 5 parameters. The description adds no additional parameter semantics beyond what's in the schema (e.g., it doesn't explain parameter interactions or provide examples). Baseline 3 is appropriate when the schema handles parameter documentation effectively.

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

Purpose4/5

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

The description clearly states the tool's purpose: 'Navigate to a URL and capture console output from the browser with streaming support.' It specifies the verb ('navigate' and 'capture'), resource ('console output'), and key feature ('streaming support'). However, it doesn't explicitly differentiate from its sibling tool 'browser-server-console', which prevents a score of 5.

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

Usage Guidelines2/5

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 versus alternatives. It doesn't mention the sibling tool 'browser-server-console' or any other context for selection. Usage is implied by the purpose but lacks explicit when/when-not instructions or prerequisites.

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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