git:20260507.50823d8 to git:20260507.44b06c0

---

name: langchain-tools

description: LangChain tool creation and integration utilities for agent systems

allowed-tools:

- Read

- Write

- Edit

- Bash

- Glob

- Grep

graph:

domains: [domain:software-engineering]

specializations: [specialization:ai-agents-conversational]

roles: [role:ml-engineer, role:backend-engineer]

workflows: [workflow:feature-development, workflow:ml-model-lifecycle]

topics: [topic:api-design]

---

# 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