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ruslanlap

PageSpeed Insights MCP Server

by ruslanlap

get_third_party_impact

Analyze how third-party scripts from entities like Google and Facebook impact page performance. Identifies which third-party resources slow down your site.

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 for behavioral disclosure. It only states the purpose without mentioning side effects, required permissions, rate limits, or return behavior. The tool is likely read-only but this is not confirmed.

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, front-loaded sentence that conveys the core functionality without wasted words. Every part adds value, including the example entities.

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 and no annotations, the description provides basic completeness for a simple read tool. However, it lacks details about the output structure, pagination, or performance characteristics, which would be helpful for an agent to fully understand the tool's behavior.

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%, so the baseline is 3. The description does not add additional meaning to parameters beyond what the schema provides. The mention of grouping by entity relates to output, not input 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 tool retrieves third-party script impact analysis grouped by entity, providing specific verb and resource. It distinguishes from sibling tools like get_javascript_analysis or get_element_analysis by focusing on third-party scripts and entity grouping.

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 offers no guidance on when to use this tool versus alternatives. No explicit context, exclusions, or sibling differentiation is provided, leaving the agent to infer usage from the name alone.

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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