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@yawlabs/electron-mcp

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by YawLabs

electron_generate_preload_bridge

Read-onlyIdempotent

Generates a complete preload.ts file with contextBridge.exposeInMainWorld to securely expose multiple IPC methods to the renderer process, including TypeScript declarations and security best practices.

Instructions

Generate a complete, secure preload.ts with contextBridge.exposeInMainWorld for multiple API methods. Produces the preload script, TypeScript declarations for window.electronAPI, and security best practices. Use this when you need to expose several main-process APIs to the renderer at once.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
methodsYesArray of methods to expose through the preload bridge
namespaceNoThe property name on window, e.g. 'electronAPI'. Defaults to 'electronAPI'.
Behavior4/5

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

Annotations already provide readOnlyHint, destructiveHint, idempotentHint. Description adds value by detailing output artifacts and security best practices. No contradictions.

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 concise sentences, action-oriented first sentence, output details second. No wasted words.

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

Completeness5/5

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

Given the tool's complexity and absence of output schema, the description fully explains what is produced. Schema covers all parameters. No missing information.

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% with detailed parameter descriptions. Description does not add new meaning beyond the schema; it summarizes but does not enhance parameter understanding.

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 it generates a preload.ts with contextBridge for multiple APIs, specifies outputs (preload script, TypeScript declarations, security best practices). Distinguishes from sibling tools like 'electron_scaffold_ipc_channel' by focusing on batch exposure.

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 says 'use this when you need to expose several main-process APIs to the renderer at once', giving clear context. Does not provide when-not-to-use or mention alternatives, but the scenario is well-defined.

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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