---
slug: python-reference/Tool
---

<a id="letta.schemas.tool.Tool"></a>

## Tool

```python
class Tool(BaseTool)
```

Representation of a tool, which is a function that can be called by the agent.

**Arguments**:

- `id` _str_ - The unique identifier of the tool.
- `name` _str_ - The name of the function.
- `tags` _List[str]_ - Metadata tags.
- `source_code` _str_ - The source code of the function.
- `json_schema` _Dict_ - The JSON schema of the function.

<a id="letta.schemas.tool.Tool.to_dict"></a>

#### to\_dict

```python
def to_dict()
```

Convert tool into OpenAI representation.

<a id="letta.schemas.tool.Tool.from_langchain"></a>

#### from\_langchain

```python
@classmethod
def from_langchain(cls, langchain_tool) -> "Tool"
```

Class method to create an instance of Tool from a Langchain tool (must be from langchain_community.tools).

**Arguments**:

- `langchain_tool` _LangchainTool_ - An instance of a crewAI BaseTool (BaseTool from crewai)


**Returns**:

- `Tool` - A Letta Tool initialized with attributes derived from the provided crewAI BaseTool object.

<a id="letta.schemas.tool.Tool.from_crewai"></a>

#### from\_crewai

```python
@classmethod
def from_crewai(cls, crewai_tool) -> "Tool"
```

Class method to create an instance of Tool from a crewAI BaseTool object.

**Arguments**:

- `crewai_tool` _CrewAIBaseTool_ - An instance of a crewAI BaseTool (BaseTool from crewai)


**Returns**:

- `Tool` - A Letta Tool initialized with attributes derived from the provided crewAI BaseTool object.