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playwright__browser_console_messages

Read-only

Retrieve browser console messages from Playwright sessions to diagnose client-side JavaScript errors, warnings, and logs, with filtering by severity and optional file export.

Instructions

[playwright] Returns all console messages

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
allNoReturn all console messages since the beginning of the session, not just since the last navigation. Defaults to false.
levelYesLevel of the console messages to return. Each level includes the messages of more severe levels. Defaults to "info".info
filenameNoFilename to save the console messages to. If not provided, messages are returned as text.
Behavior2/5

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

Annotations already declare readOnlyHint/openWorldHint/destructiveHint, so the bar is lowered. The description adds no behavioral context beyond the title and schema, such as navigation scoping, default level filtering, or output shape.

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?

A single front-loaded sentence with no filler. It is concise, though borderline under-specified; the word 'all' could mislead given the level filtering defined in the schema.

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?

The schema and annotations cover parameters and safety, but the description omits the output format and page-specific context an agent needs to consume results. For a simple read-only tool this is minimally adequate with clear gaps.

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 description coverage is 100%, with detailed descriptions for level, all, and filename. The description itself contributes no parameter semantics, but the schema carries the burden, so baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a clear verb and object: 'Returns all console messages'. It is unambiguous about the resource, though it does not distinguish it from sibling browser tools or clarify page vs session scope.

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 given on when to use this tool versus alternatives. Sibling tools like network_requests or snapshot could overlap in debugging scenarios, but the description offers no selection criteria 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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