lazy-tool

Overview

lazy-tool is a Go-based MCP server that addresses tool sprawl by implementing a search-before-invoke pattern. Instead of dumping all tool schemas into every prompt, it maintains a local SQLite catalog of MCP tools, prompts, and resources. This reduces input tokens by up to 46% and improves selection accuracy. The tool operates in three modes: direct (transparent proxy), search (5 meta-tools for discovery), and hybrid (both), allowing flexibility for different model capabilities and tool catalog sizes.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• search_tools

  Find capabilities by keyword or description

  Try:Search for file management toolsTry:Find tools related to database operations
• inspect_capability

  Get full schema before calling

  Try:Inspect the schema of the echo toolTry:Show me details of the file upload tool
• invoke_proxy_tool

  Call an upstream tool through the proxy

  Try:Invoke the echo tool with 'hello world'Try:Use the proxy tool to send a notification
• get_proxy_prompt

  Fetch an upstream prompt

  Try:Get the prompt for code generationTry:Fetch the writing assistant prompt
• read_proxy_resource

  Read an upstream resource

  Try:Read the project documentation resourceTry:Access the company knowledge base

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Installation

curl -sSfL https://raw.githubusercontent.com/rpgeeganage/lazy-tool/main/install.sh | sh

go install github.com/rpgeeganage/lazy-tool/cmd/lazy-tool@latest
make build

{
  "mcpServers": {
    "lazy-tool": {
      "command": "lazy-tool",
      "args": ["serve"]
    }
  }
}

FAQ

How does lazy-tool reduce prompt bloat?

Instead of sending all tool schemas to the model in every prompt, it maintains a local searchable catalog. The model first queries for relevant tools using search tools before invoking specific functionality.

What modes does lazy-tool support?

Three modes: direct (exposes all tools as first-class MCP tools), search (provides 5 meta-tools for discovery), and hybrid (both search and direct tools available).

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