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ruslanlap

PageSpeed Insights MCP Server

by ruslanlap

get_third_party_impact

Analyze third-party script impact on page speed, grouped by entity like Google or Facebook, to identify performance bottlenecks.

Instructions

Get third-party script impact analysis grouped by entity (Google, Facebook, etc.)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesThe URL to analyze
strategyNoAnalysis strategymobile
Behavior2/5

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

No annotations are provided, so the description carries full burden. It only states what the tool returns ('impact analysis grouped by entity'), but not behaviors like authorization needs, performance implications, or side effects.

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 sentence with no redundant words, front-loaded with the action and resource.

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?

Given no output schema, the description could detail the output structure (e.g., metrics per entity). It is adequate but lacks specifics needed for an agent to fully understand the return value.

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 coverage is 100%, with both parameters having descriptions. The tool description adds no additional parameter meaning beyond what the schema already provides.

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 verb 'Get', the resource 'third-party script impact analysis', and the grouping behavior 'by entity (Google, Facebook, etc.)', distinguishing it from siblings like get_javascript_analysis.

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

Usage Guidelines3/5

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

No explicit when-to-use or when-not-to-use guidance. The description implies usage for grouped third-party impact analysis but does not mention alternatives or exclusions.

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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