Module tool 

Tool registry and agents for LLM function calling.

This module provides infrastructure for registering, managing, and invoking tools that can be called by LLMs. It includes:

• A global tool registry for registering and looking up tools by name
• The Tool trait for implementing custom tools
• Agents for working with tools in workflows:
  • ListToolsAgent - Lists available tools matching a pattern
  • PresetToolAgent - Exposes a workflow as a callable tool
  • CallToolMessageAgent - Processes tool calls from LLM messages
  • CallToolAgent - Directly invokes a tool by name

Structs

CallToolAgent

Agent that directly invokes a tool by name.

CallToolMessageAgent

Agent that processes tool calls from LLM messages.

ListToolsAgent

Agent that lists available tools.

PresetToolAgent

Agent that exposes a workflow as a callable tool.

ToolInfo

Metadata describing a tool available for LLM function calling.

Traits

Tool

Trait for implementing callable tools.

Functions

call_tool

Invokes a tool by name with the given arguments.

call_tools

Executes multiple tool calls and returns the results as messages.

get_tool

Retrieves a tool by name from the global registry.

list_tool_infos

Returns information about all registered tools.

list_tool_infos_patterns

Returns tool information for tools matching the given regex patterns.

register_tool

Registers a tool with the global registry.

unregister_tool

Removes a tool from the global registry by name.