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babelwrap

io.github.soulfir/babelwrap-mcp

by babelwrap

babelwrap_list_pages

List all open browser tabs and popups in a session to discover pages opened by popups or target=_blank links for easy navigation.

Instructions

List all open pages (tabs/popups) in this browser session.

Use this to discover tabs opened by popups or target="_blank" links, then switch to them with babelwrap_switch_page.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYesThe active session ID.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

No annotations provided, so description carries full burden. It does not mention whether the operation is read-only, any side effects, or response format beyond basic listing. Minimal behavioral 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?

Two sentences, front-loaded with core purpose. No wasted words. Perfectly concise.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple list tool with an output schema, description adequately explains purpose and parameter. Could mention that it returns page identifiers for use with babelwrap_switch_page, but overall sufficient.

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 coverage is 100% for the single parameter session_id. Description adds no additional meaning beyond what the schema provides. Baseline 3.

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?

Description clearly states 'list all open pages (tabs/popups)' and gives a specific use case ('discover tabs opened by popups'). It effectively differentiates from sibling babelwrap_switch_page.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly tells when to use the tool ('to discover tabs') and provides the next step ('then switch to them with babelwrap_switch_page'). No explicit when-not, but sufficient for a simple listing tool.

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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