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aakarshitsharma06

Playwright Debug MCP Server

analyze_trace

Analyze Playwright trace files to identify test failures and errors, providing detailed insights into actions, network logs, and screenshots.

Instructions

Analyze a Playwright trace.zip file for a failed test

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
trace_pathYesAbsolute path to trace.zip file
Behavior2/5

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

No annotations are provided, so the description must disclose behavior. It only states the purpose without detailing output, side effects, or permissions. The description does not reveal what the analysis produces or any constraints.

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 concise sentence, but could be more structured by front-loading key terms. It is efficient with no wasted words.

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 one parameter, no output schema, and no annotations, the description is insufficient. It does not explain what the analysis entails, what the output looks like, or any behavioral details, leaving significant gaps for correct tool invocation.

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?

The parameter 'trace_path' is fully described in the schema with coverage 100%. The description adds contextual purpose but no additional parameter meaning beyond the schema.

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 'Analyze', the resource 'Playwright trace.zip file', and the context 'for a failed test'. It distinguishes from siblings like get_action_history or get_failed_tests by specifying trace analysis.

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 vs alternatives, nor prerequisites such as requiring a trace from a failed test. The description provides no exclusions or context for appropriate usage.

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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