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DailyNoBug

Playwright Browser MCP Server

by DailyNoBug

Page Snapshot

browser.snapshot

Get a structured snapshot of the current page for LLM consumption. Choose minimal, normal, or rich detail level for the extracted data.

Instructions

Get a structured snapshot of the current page for LLM consumption.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sessionIdYes
detailLevelNo
Behavior2/5

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

Annotations are absent, and the description only states the action without disclosing any behavioral traits. It does not say whether the tool is read-only, what fields the snapshot contains, or how detailLevel affects the output, leaving the agent to infer basic 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 concise sentence that front-loads the key action and resource. Every word adds value, and there is no unnecessary redundancy.

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?

With no annotations or output schema, the description carries the full burden but provides minimal context. It does not explain the structure of the snapshot, the impact of detailLevel, or what the agent should expect in the response, making it incomplete for a tool with an adjustable parameter.

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

Parameters2/5

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

Schema description coverage is 0%, and the description does not explain the purpose of sessionId or detailLevel. While the enum for detailLevel provides some hints, the description adds no extra meaning to the 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 uses a specific verb 'Get' and resource 'structured snapshot of the current page' which clearly states the tool's function. It distinguishes from sibling extraction tools by emphasizing 'structured' and 'LLM consumption', signaling a comprehensive page representation rather than targeted extraction.

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 is provided on when to use this tool versus alternatives like extract_text or get_interactive_elements. There is no mention of preferred scenarios, prerequisites, 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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