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find_unused_javascript

Audit a web page to identify unused JavaScript code, reducing bundle size by reporting bytes above a threshold.

Instructions

Find unused JavaScript code to reduce bundle size

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesURL to audit
deviceNoDevice to emulate (default: desktop)desktop
minBytesNoMinimum unused bytes to report (default: 2048)
Behavior2/5

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

No annotations provided, and the description only states the purpose without behavioral details: how it finds unused code (static analysis?), whether it requires page load, or side effects. As a result, the description fails to compensate for missing annotations.

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?

Single, front-loaded sentence with zero waste. Every word earns its place.

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?

Despite 3 parameters and no output schema, the description is too brief. It omits crucial details like the analysis approach, return format, or intended scope (e.g., whole page vs. specific resources). For a performance tool, incomplete.

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 covers all 3 parameters with descriptions (coverage 100%). The description adds no extra meaning beyond the schema, so baseline score of 3 is appropriate.

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?

Clear verb 'find' and specific resource 'unused JavaScript code' with explicit goal to reduce bundle size. Distinguishes from sibling tools like analyze_resources or run_audit by focusing on unused code.

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?

No guidance on when to use this tool versus alternatives like analyze_resources or get_performance_score. Misses opportunity to differentiate or specify 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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