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aakarshitsharma06

Playwright Debug MCP Server

get_screenshots_around_time

Get screenshots captured immediately before and after a specific timestamp in a Playwright trace for visual debugging.

Instructions

Get screenshots immediately before and after a specific timestamp in the trace

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
trace_pathYes
target_timeYesThe timeline timestamp (in ms) of the action
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It mentions 'immediately before and after' but does not specify what 'immediately' means (e.g., count of screenshots, relation to adjacent actions) or disclose any behavioral traits like permissions 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.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no wasted words. It could benefit from additional detail, but it is concise.

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?

Given no output schema, no annotations, and an incomplete parameter description, the description does not sufficiently explain the tool's behavior (e.g., number of screenshots, prerequisites). It leaves important questions unanswered.

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 coverage is 50% (only target_time has a description). The tool description does not add meaning beyond the schema; it merely echoes 'timestamp'. It fails to clarify the purpose of trace_path or provide additional context.

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' and the resource 'screenshots' along with a specific context ('immediately before and after a specific timestamp'). It distinguishes from sibling tools like get_action_history and get_network_log.

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?

The description implies usage when needing screenshots around a timestamp but does not explicitly state when to use this tool versus alternatives or provide any 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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