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Better Browser MCP

by nbiish

browser_get_console_logs

Retrieve browser console logs to debug page issues. Optionally specify a tab to fetch logs from that page.

Instructions

Get the console logs from the browser

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tabIdNoOptional tab ID to target. When omitted, routes to the agent's active tab. Use browser_list_tabs to see available tab IDs.
Behavior2/5

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

With no annotations provided, the description must carry the full burden of behavioral disclosure, but it simply restates the operation. It does not mention return format, whether logs are cleared, or the scope (active tab vs. all tabs), leaving the agent without important context.

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 with no filler. It is front-loaded with the verb and object, making it easy to parse quickly.

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 tool is simple with one optional parameter and no output schema, so some minimalism is acceptable. However, the description does not mention what the returned console logs look like or whether they are filtered by tab, which could leave the agent uncertain. It is minimally viable but not rich.

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 input schema fully documents the single optional parameter 'tabId' with a clear description of active-tab fallback and reference to browser_list_tabs. The description itself adds no parameter-level detail, so it receives the baseline score for high schema coverage.

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 ('console logs'), making the tool's function immediately clear. It also distinguishes itself from sibling browser tools, none of which explicitly target console log retrieval.

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 like browser_evaluate or browser_get_attribute. There is no mention of appropriate contexts, exclusions, or prerequisites.

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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