inspect_ai.tool

Tools

bash

Bash shell command execution tool.

Execute bash shell commands using a sandbox environment (e.g. “docker”).

@tool(viewer=code_viewer("bash", "cmd"))
def bash(
    timeout: int | None = None, user: str | None = None, sandbox: str | None = None
) -> Tool

timeout int | None: Timeout (in seconds) for command.
user str | None: User to execute commands as.
sandbox str | None: Optional sandbox environmnent name.

python

Python code execution tool.

Execute Python code using a sandbox environment (e.g. “docker”).

Source

@tool(viewer=code_viewer("python", "code"))
def python(
    timeout: int | None = None, user: str | None = None, sandbox: str | None = None
) -> Tool

timeout int | None: Timeout (in seconds) for command.
user str | None: User to execute commands as.
sandbox str | None: Optional sandbox environmnent name.

bash_session

Bash shell session command execution tool.

Execute bash shell commands in a long running session using a sandbox environment (e.g. “docker”).

By default, a separate bash process is created within the sandbox for each call to bash_session(). You can modify this behavior by passing instance=None (which will result in a single bash process for the entire sample) or use other instance values that implement another scheme).

See complete documentation at https://inspect.aisi.org.uk/tools-standard.html#sec-bash-session.

Source

@tool(viewer=code_viewer("bash", "command"))
def bash_session(*, timeout: int | None = None, instance: str | None = uuid()) -> Tool

timeout int | None: Timeout (in seconds) for command.
instance str | None: Instance id (each unique instance id has its own bash process)

text_editor

Custom editing tool for viewing, creating and editing files.

Perform text editor operations using a sandbox environment (e.g. “docker”).

IMPORTANT: This tool does not currently support Subtask isolation. This means that a change made to a file by on Subtask will be visible to another Subtask.

Source

@tool()
def text_editor(timeout: int | None = None, user: str | None = None) -> Tool

timeout int | None: Timeout (in seconds) for command.
user str | None: User to execute commands as.

web_browser

Tools used for web browser navigation.

By default, a separate web browser process is created within the sandbox for each call to web_browser(). You can modify this behavior by passing instance=None (which will result in a single web browser for the entire sample) or use other instance values that implement another scheme).

See complete documentation at https://inspect.aisi.org.uk/tools-standard.html#sec-web-browser.

Source

def web_browser(
    *, interactive: bool = True, instance: str | None = uuid()
) -> list[Tool]

interactive bool: Provide interactive tools (enable clicking, typing, and submitting forms). Defaults to True.
instance str | None: Instance id (each unique instance id has its own web browser process)

computer

Desktop computer tool.

See documentation at https://inspect.aisi.org.uk/tools-standard.html#sec-computer.

Source

@tool
def computer(max_screenshots: int | None = 1, timeout: int | None = 180) -> Tool

max_screenshots int | None: The maximum number of screenshots to play back to the model as input. Defaults to 1 (set to None to have no limit).
timeout int | None: Timeout in seconds for computer tool actions. Defaults to 180 (set to None for no timeout).

web_search

Web search tool.

A tool that can be registered for use by models to search the web. Use the use_tools() solver to make the tool available (e.g. use_tools(web_search())))

A web search is conducted using the specified provider, the results are parsed for relevance using the specified model, and the top ‘num_results’ relevant pages are returned.

See further documentation at https://inspect.aisi.org.uk/tools-standard.html#sec-web-search.

Source

@tool
def web_search(
    provider: Literal["google"] = "google",
    num_results: int = 3,
    max_provider_calls: int = 3,
    max_connections: int = 10,
    model: str | None = None,
) -> Tool

provider Literal['google']: Search provider (defaults to “google”, currently the only provider). Possible future providers include “brave” and “bing”.
num_results int: Number of web search result pages to return to the model.
max_provider_calls int: Maximum number of search calls to make to the search provider.
max_connections int: Maximum number of concurrent connections to API endpoint of search provider.
model str | None: Model used to parse web pages for relevance.

think

Think tool for extra thinking.

Tool that provides models with the ability to include an additional thinking step as part of getting to its final answer.

Note that the think() tool is not a substitute for reasoning and extended thinking, but rather an an alternate way of letting models express thinking that is better suited to some tool use scenarios. Please see the documentation on using the think tool before using it in your evaluations.

Source

@tool
def think(
    description: str | None = None,
    thought_description: str | None = None,
) -> Tool

description str | None: Override the default description of the think tool.
thought_description str | None: Override the default description of the thought parameter.

MCP

mcp_connection

Context manager for running MCP servers required by tools.

Any ToolSource passed in tools will be examined to see if it references an MCPServer, and if so, that server will be connected to upon entering the context and disconnected from upon exiting the context.

Source

@contextlib.asynccontextmanager
async def mcp_connection(
    tools: Sequence[Tool | ToolDef | ToolSource] | ToolSource,
) -> AsyncIterator[None]

tools Sequence[Tool | ToolDef | ToolSource] | ToolSource: Tools in current context.

mcp_server_stdio

MCP Server (Stdio).

Stdio interface to MCP server. Use this for MCP servers that run locally.

Source

def mcp_server_stdio(
    *,
    command: str,
    args: list[str] = [],
    cwd: str | Path | None = None,
    env: dict[str, str] | None = None,
) -> MCPServer

command str: The executable to run to start the server.
args list[str]: Command line arguments to pass to the executable.
cwd str | Path | None: The working directory to use when spawning the process.
env dict[str, str] | None: The environment to use when spawning the process in addition to the platform specific set of default environment variables (e.g. “HOME”, “LOGNAME”, “PATH”, “SHELL”, “TERM”, and “USER” for Posix-based systems).

mcp_server_sse

MCP Server (SSE).

SSE interface to MCP server. Use this for MCP servers available via a URL endpoint.

Source

def mcp_server_sse(
    *,
    url: str,
    headers: dict[str, Any] | None = None,
    timeout: float = 5,
    sse_read_timeout: float = 60 * 5,
) -> MCPServer

url str: URL to remote server
headers dict[str, Any] | None: Headers to send server (typically authorization is included here)
timeout float: Timeout for HTTP operations
sse_read_timeout float: How long (in seconds) the client will wait for a new event before disconnecting.

mcp_server_sandbox

MCP Server (Sandbox).

Interface to MCP server running in an Inspect sandbox.

Source

def mcp_server_sandbox(
    *,
    command: str,
    args: list[str] = [],
    cwd: str | Path | None = None,
    env: dict[str, str] | None = None,
    sandbox: str | None = None,
) -> MCPServer

command str: The executable to run to start the server.
args list[str]: Command line arguments to pass to the executable.
cwd str | Path | None: The working directory to use when spawning the process.
env dict[str, str] | None: The environment to use when spawning the process in addition to the platform specific set of default environment variables (e.g. “HOME”, “LOGNAME”, “PATH”, “SHELL”, “TERM”, and “USER” for Posix-based systems).
sandbox str | None: The sandbox to use when spawning the process.

mcp_tools

Tools from MCP server.

Source

def mcp_tools(
    server: MCPServer,
    *,
    tools: Literal["all"] | list[str] = "all",
) -> ToolSource

server MCPServer: MCP server created with mcp_server_stdio() or mcp_server_sse()
tools Literal['all'] | list[str]: List of tool names (or globs) (defaults to “all”) which returns all tools.

MCPServer

Model Context Protocol server interface.

MCPServer can be passed in the tools argument as a source of tools (use the mcp_tools() function to filter the list of tools)

Source

class MCPServer(ToolSource)

Methods

tools

List of all tools provided by this server.

Source

async def tools(self) -> list[Tool]

Dynamic

tool_with

Tool with modifications to various attributes.

This function modifies the passed tool in place and returns it. If you want to create multiple variations of a single tool using tool_with() you should create the underlying tool multiple times.

Source

def tool_with(
    tool: Tool,
    name: str | None = None,
    description: str | None = None,
    parameters: dict[str, str] | None = None,
    parallel: bool | None = None,
    viewer: ToolCallViewer | None = None,
    model_input: ToolCallModelInput | None = None,
) -> Tool

tool Tool: Tool instance to modify.
name str | None: Tool name (optional).
description str | None: Tool description (optional).
parameters dict[str, str] | None: Parameter descriptions (optional)
parallel bool | None: Does the tool support parallel execution (defaults to True if not specified)
viewer ToolCallViewer | None: Optional tool call viewer implementation.
model_input ToolCallModelInput | None: Optional function that determines how tool call results are played back as model input.

ToolDef

Tool definition.

Source

class ToolDef

Attributes

tool Callable[..., Any]: Callable to execute tool.
name str: Tool name.
description str: Tool description.
parameters ToolParams: Tool parameter descriptions.
parallel bool: Supports parallel execution.
viewer ToolCallViewer | None: Custom viewer for tool call
model_input ToolCallModelInput | None: Custom model input presenter for tool calls.

Methods

__init__

Create a tool definition.

Source

def __init__(
    self,
    tool: Callable[..., Any],
    name: str | None = None,
    description: str | None = None,
    parameters: dict[str, str] | ToolParams | None = None,
    parallel: bool | None = None,
    viewer: ToolCallViewer | None = None,
    model_input: ToolCallModelInput | None = None,
) -> None

tool Callable[..., Any]: Callable to execute tool.
name str | None: Name of tool. Discovered automatically if not specified.
description str | None: Description of tool. Discovered automatically by parsing doc comments if not specified.
parameters dict[str, str] | ToolParams | None: Tool parameter descriptions and types. Discovered automatically by parsing doc comments if not specified.
parallel bool | None: Does the tool support parallel execution (defaults to True if not specified)
viewer ToolCallViewer | None: Optional tool call viewer implementation.
model_input ToolCallModelInput | None: Optional function that determines how tool call results are played back as model input.

as_tool

Convert a ToolDef to a Tool.

Source

def as_tool(self) -> Tool

Types

Tool

Additional tool that an agent can use to solve a task.

Source

class Tool(Protocol):
    async def __call__(
        self,
        *args: Any,
        **kwargs: Any,
    ) -> ToolResult

*args Any: Arguments for the tool.
**kwargs Any: Keyword arguments for the tool.

Examples

@tool
def add() -> Tool:
    async def execute(x: int, y: int) -> int:
        return x + y

    return execute

ToolResult

Valid types for results from tool calls.

Source

ToolResult = (
    str
    | int
    | float
    | bool
    | ContentText
    | ContentReasoning
    | ContentImage
    | ContentAudio
    | ContentVideo
    | list[ContentText | ContentReasoning | ContentImage | ContentAudio | ContentVideo]
)

ToolError

Exception thrown from tool call.

If you throw a ToolError form within a tool call, the error will be reported to the model for further processing (rather than ending the sample). If you want to raise a fatal error from a tool call use an appropriate standard exception type (e.g. RuntimeError, ValueError, etc.)

Source

class ToolError(Exception)

Methods

__init__

Create a ToolError.

Source

def __init__(self, message: str) -> None

message str: Error message to report to the model.

ToolCallError

Error raised by a tool call.

Source

@dataclass
class ToolCallError

Attributes

type Literal['parsing', 'timeout', 'unicode_decode', 'permission', 'file_not_found', 'is_a_directory', 'output_limit', 'approval', 'unknown']: Error type.
message str: Error message.

ToolChoice

Specify which tool to call.

“auto” means the model decides; “any” means use at least one tool, “none” means never call a tool; ToolFunction instructs the model to call a specific function.

Source

ToolChoice = Union[Literal["auto", "any", "none"], ToolFunction]

ToolFunction

Indicate that a specific tool function should be called.

Source

@dataclass
class ToolFunction

Attributes

name str: The name of the tool function to call.

ToolInfo

Specification of a tool (JSON Schema compatible)

If you are implementing a ModelAPI, most LLM libraries can be passed this object (dumped to a dict) directly as a function specification. For example, in the OpenAI provider:

ChatCompletionToolParam(
    type="function",
    function=tool.model_dump(exclude_none=True),
)

In some cases the field names don’t match up exactly. In that case call model_dump() on the parameters field. For example, in the Anthropic provider:

ToolParam(
    name=tool.name,
    description=tool.description,
    input_schema=tool.parameters.model_dump(exclude_none=True),
)

Source

class ToolInfo(BaseModel)

Attributes

name str: Name of tool.
description str: Short description of tool.
parameters ToolParams: JSON Schema of tool parameters object.

ToolParams

Description of tool parameters object in JSON Schema format.

Source

class ToolParams(BaseModel)

Attributes

type Literal['object']: Params type (always ‘object’)
properties dict[str, ToolParam]: Tool function parameters.
required list[str]: List of required fields.
additionalProperties bool: Are additional object properties allowed? (always False)

ToolParam

Description of tool parameter in JSON Schema format.

Source

ToolParam: TypeAlias = JSONSchema

ToolSource

Protocol for dynamically providing a set of tools.

Source

@runtime_checkable
class ToolSource(Protocol)

Methods

tools

Retrieve tools from tool source.

Source

async def tools(self) -> list[Tool]

Decorator

tool

Decorator for registering tools.

Source

def tool(
    func: Callable[P, Tool] | None = None,
    *,
    name: str | None = None,
    viewer: ToolCallViewer | None = None,
    model_input: ToolCallModelInput | None = None,
    parallel: bool = True,
    prompt: str | None = None,
) -> Callable[P, Tool] | Callable[[Callable[P, Tool]], Callable[P, Tool]]

func Callable[P, Tool] | None: Tool function
name str | None: Optional name for tool. If the decorator has no name argument then the name of the tool creation function will be used as the name of the tool.
viewer ToolCallViewer | None: Provide a custom view of tool call and context.
model_input ToolCallModelInput | None: Provide a custom function for playing back tool results as model input.
parallel bool: Does this tool support parallel execution? (defaults to True).
prompt str | None: Deprecated (provide all descriptive information about the tool within the tool function’s doc comment)

Examples

@tool
def add() -> Tool:
    async def execute(x: int, y: int) -> int:
        return x + y

    return execute