Module tool 

Available on crate feature tools only.

Tool system and built-in tools.

Give agents capabilities beyond conversation:

• FunctionTool - Wrap async functions as tools
• GoogleSearchTool - Web search
• ExitLoopTool - Control loop agents
• McpToolset - MCP server integration with the mcp feature
• CodeTool / PythonCodeTool / JavaScriptCodeTool / MontyPythonCodeTool - Code execution with the code-tools feature (included in full); the embedded live paths need code-embedded-js / code-embedded-python

Available with feature: tools

Modules

builtin

Built-in tool wrappers for Gemini, OpenAI, and Anthropic hosted tools.

code_executioncode

Code execution tools for ADK agents.

mcpmcp

Model Context Protocol (MCP) clients, server SDK re-export, catalog APIs, elicitation, tasks, HTTP transport, and dynamic local-server management.

toolset

Toolset combinators: basic, filtered, merged, and prefixed toolsets.

Structs

AdkError

Unified structured error type for all ADK-Rust operations.

AgentTool

AgentTool wraps an Agent to make it callable as a Tool.

AgentToolConfig

Configuration options for AgentTool behavior.

AnthropicBashTool20241022

Anthropic native bash tool declaration for the bash_20241022 version.

AnthropicBashTool20250124

Anthropic native bash tool declaration for the bash_20250124 version.

AnthropicTextEditorTool20250124

Anthropic native text editor declaration for text_editor_20250124.

AnthropicTextEditorTool20250429

Anthropic native text editor declaration for text_editor_20250429.

AnthropicTextEditorTool20250728

Anthropic native text editor declaration for text_editor_20250728.

AutoDeclineElicitationHandler

Default handler that declines all elicitation requests.

BasicToolset

A simple toolset that wraps a static list of tools with optional filtering.

BypassBuiltinTool

A built-in tool converted into a function-calling tool so it can coexist with custom function tools under the Gemini Interactions API.

CodeTool

A tool that executes code through language-specific pipelines.

ExitLoopTool

A control-flow tool that signals a loop agent to exit its iteration cycle.

FilteredToolset

A toolset wrapper that filters tools from an inner toolset using a predicate.

FrontendCodeTool

Container-backed frontend code execution tool.

FunctionTool

A tool created from an async Rust function.

GeminiCodeExecutionTool

Gemini built-in code execution tool.

GeminiComputerUseTool

Gemini built-in computer use tool declaration.

GeminiFileSearchTool

Gemini built-in file search tool.

GoogleMapsContext

Contextual Google Maps location used by Gemini retrieval config.

GoogleMapsTool

Gemini built-in Google Maps grounding tool.

GoogleSearchTool

GoogleSearch is a built-in tool that is automatically invoked by Gemini models to retrieve search results from Google Search. The tool operates internally within the model and does not require or perform local code execution.

JavaScriptCodeTool

Embedded JavaScript code execution tool.

LoadArtifactsTool

A tool that loads binary artifacts by name and returns their content.

McpHttpClientBuilder

Builder for HTTP-based MCP connections.

McpServerManager

Manages the full lifecycle of multiple local MCP server child processes.

McpTaskConfig

Configuration for MCP task-based execution

McpToolset

MCP Toolset - connects to an MCP server and exposes its tools as ADK tools.

MergedToolset

A toolset that merges tools from multiple inner toolsets into one.

MontyPythonCodeTool

Embedded Python code execution tool backed by the Monty interpreter.

MontyPythonCodeToolBuilder

Configures a MontyPythonCodeTool: OS-access grants, host functions, and limits are forwarded to MontyExecutorBuilder; the terminal methods select the mode.

OAuth2Config

OAuth2 configuration for MCP authentication

OpenAIApplyPatchTool

OpenAI apply_patch tool declaration.

OpenAIApproximateLocation

Approximate user location for OpenAI web search.

OpenAICodeInterpreterTool

OpenAI hosted code interpreter tool.

OpenAIComputerUseTool

OpenAI computer use tool declaration.

OpenAIFileSearchTool

OpenAI hosted file search tool.

OpenAIImageGenerationTool

OpenAI hosted image generation tool.

OpenAILocalShellTool

OpenAI local shell tool declaration.

OpenAIMcpTool

OpenAI remote MCP tool declaration.

OpenAIShellTool

OpenAI managed shell tool declaration.

OpenAIWebSearchTool

OpenAI hosted web search tool.

PrefixedToolset

A toolset wrapper that prefixes all tool names from an inner toolset.

PythonCodeTool

Container-backed Python code execution tool.

Resource

A known resource that the server is capable of reading (spec Resource).

ResourceTemplate

A template description for resources available on the server (spec ResourceTemplate).

SimpleToolContext

A lightweight ToolContext with sensible defaults for non-agent callers.

StatefulTool

A generic tool wrapper that manages shared state for stateful closures.

UrlContextTool

UrlContext is a built-in tool that is automatically invoked by Gemini models to fetch and analyze content from URLs. The tool operates internally within the model and does not require or perform local code execution.

WebSearchTool

WebSearch is a built-in tool for Anthropic Claude models that enables server-side web search. The model searches the web internally and returns results as ServerToolUse / WebSearchToolResult content blocks.

WebSearchUserLocation

Approximate user location for Anthropic’s web search tool.

Enums

GeminiComputerEnvironment

Target environment for Gemini computer use.

McpAuth

Authentication configuration for MCP connections

OpenAIComputerEnvironment

OpenAI computer use environment.

ResourceContents

The contents of a specific resource or sub-resource.

Traits

BypassMultiToolsLimit

Generalizes the bypass_multi_tools_limit conversion so any built-in tool can adopt it ergonomically.

ElicitationHandler

Trait for handling MCP elicitation requests from servers.

ResourceNotificationHandler

Receives resource update notifications from an MCP server.

Tool

The core trait for all tools that agents can invoke.

ToolContext

Context available to tools during execution.

Toolset

A collection of tools that can be resolved dynamically from context.

Functions

string_predicate

Creates a predicate that allows only tools with names in the provided list.

Type Aliases

Result

Convenience alias used throughout ADK crates.

Attribute Macros

async_trait

tool

Attribute macro that generates a Tool implementation from an async function.