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title: tool_manager
sidebarTitle: tool_manager
---
# `fastmcp.tools.tool_manager`
## Classes
### `ToolManager` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/tools/tool_manager.py#L22"><Icon icon="github" size="14" /></a></sup>
Manages FastMCP tools.
**Methods:**
#### `mount` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/tools/tool_manager.py#L46"><Icon icon="github" size="14" /></a></sup>
```python
mount(self, server: MountedServer) -> None
```
Adds a mounted server as a source for tools.
#### `add_tool_from_fn` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/tools/tool_manager.py#L113"><Icon icon="github" size="14" /></a></sup>
```python
add_tool_from_fn(self, fn: Callable[..., Any], name: str | None = None, description: str | None = None, tags: set[str] | None = None, annotations: ToolAnnotations | None = None, serializer: Callable[[Any], str] | None = None, exclude_args: list[str] | None = None) -> Tool
```
Add a tool to the server.
#### `add_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/tools/tool_manager.py#L142"><Icon icon="github" size="14" /></a></sup>
```python
add_tool(self, tool: Tool) -> Tool
```
Register a tool with the server.
#### `remove_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/tools/tool_manager.py#L159"><Icon icon="github" size="14" /></a></sup>
```python
remove_tool(self, key: str) -> None
```
Remove a tool from the server.
**Args:**
- `key`: The key of the tool to remove
**Raises:**
- `NotFoundError`: If the tool is not found
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