Deps
Dependency flags and optional imports for ToolNode.
This module manages optional third-party dependencies for the ToolNode implementation, providing clean import handling and feature flags. It isolates optional imports to prevent ImportError cascades when optional dependencies are not installed.
The module handles two main optional dependency groups: 1. MCP (Model Context Protocol) support via 'fastmcp' and 'mcp' packages 2. Future extensibility for other optional tool providers
By centralizing optional imports here, other modules can safely import the flags and types without triggering ImportError exceptions, allowing graceful degradation when optional features are not available.
Typical usage
from .deps import HAS_FASTMCP, HAS_MCP, Client
if HAS_FASTMCP and HAS_MCP:
# Use MCP functionality
client = Client(...)
else:
# Graceful fallback or error message
client = None
FastMCP integration support.
Boolean flag indicating whether FastMCP is available.
True if 'fastmcp' package is installed and imports successfully.
FastMCP Client class for connecting to MCP servers.
None if FastMCP is not available.
Result type for MCP tool executions.
None if FastMCP is not available.
Attributes:
| Name | Type | Description |
|---|---|---|
HAS_FASTMCP |
|
|
HAS_MCP |
|