# Langchain Tools

> LangChain tool creation and integration utilities for agent systems

- Skill: `a5c-ai/langchain-tools` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add a5c-ai/langchain-tools`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/langchain-tools/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/langchain-tools

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# LangChain Tools Skill

## Capabilities

- Create custom LangChain tools with proper schemas
- Integrate existing tools and APIs
- Design tool descriptions for optimal LLM understanding
- Implement structured tool inputs with Pydantic
- Handle tool errors and fallbacks
- Create tool chains and pipelines

## Target Processes

- custom-tool-development
- function-calling-agent

## Implementation Details

### Tool Creation Patterns

1. **@tool decorator**: Simple function-based tools
2. **StructuredTool**: Tools with complex input schemas
3. **BaseTool subclass**: Full control over tool behavior
4. **Tool from functions**: Dynamic tool creation

### Configuration Options

- Tool name and description
- Input schema (args_schema)
- Return type specification
- Error handling strategy
- Async/sync execution modes

### Best Practices

- Clear, action-oriented descriptions
- Explicit input parameter documentation
- Proper error messages for LLM understanding
- Idempotent operations where possible

### Dependencies

- langchain-core
- pydantic