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usable-browser-agent-free

browser_network_log

Inspect network requests made by the browser to diagnose failed actions, locate API endpoints, and verify successful resource loads.

Instructions

Inspect recent network requests (method, URL, status, type, errors) the browser made. Use to diagnose why a button 'did nothing', find an API endpoint, or confirm a request succeeded.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
typeNoResource type, e.g. xmlhttprequest, script, document, image.
limitNoMax requests to return (default 50).
filterNoOnly requests whose URL contains this substring.
onlyErrorsNoOnly failed requests (network error or status >= 400).

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.7.0

TDQS

A4/5.0
Behavior3/5

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

No annotations are provided, so the description carries full responsibility. It implies a read-only operation via 'Inspect' but does not explicitly state safety, side effects, or that it does not modify browser state. It does describe the data returned, which is helpful, but stops short of full transparency.

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?

Two concise sentences: the first states the core purpose and data, the second gives practical use cases. No redundant words, and the key info is front-loaded.

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

Completeness4/5

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

For a simple read-only inspection tool with no output schema, the description adequately covers what it returns and common use cases. It doesn't explain how to interpret errors or pagination, but those are minor given the tool's simplicity and the schema covering parameters.

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 four parameters. The description adds no extra meaning beyond the schema; it only mentions the response fields, not parameter nuances. Baseline 3 applies.

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 a specific verb ('Inspect') and resource ('recent network requests'), and lists the key fields (method, URL, status, type, errors). It distinguishes itself from sibling tools like browser_status or browser_info, which focus on browser state rather than network activity.

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 provides concrete use cases: diagnosing why a button 'did nothing', finding an API endpoint, or confirming a request succeeded. These give clear context for when to use the tool. It lacks explicit 'when not to use' or alternatives, but the context is strong enough to guide selection.

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