Tools

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Tools are typically connected to agent components at the Tools port. Agents use LLMs as a reasoning engine to decide which of the connected tool components to use to solve a problem.

Tools in agentic functions are, essentially, functions that the agent can call to perform tasks or access external resources. A function is wrapped as a Tool object, with a common interface the agent understands. Agents become aware of tools through tool registration, where the agent is provided a list of available tools, typically at agent initialization. The Tool object’s description tells the agent what the tool can do.

The agent then uses a connected LLM to reason through the problem to decide which tool is best for the job.

Use a tool in a flow

Tools are typically connected to agent components at the Tools port.

The simple agent starter project uses URL and Calculator tools connected to an agent component to answer a user’s questions. The OpenAI LLM acts as a brain for the agent to decide which tool to use.

To make a component into a tool that an agent can use, enable Tool mode in the component. Enabling Tool mode modifies a component input to accept calls from an agent. If the component you want to connect to an agent doesn’t have a Tool mode option, you can modify the component’s inputs to become a tool. For an example, see Make any component a tool.

arXiv

This component searches and retrieves papers from arXiv.org.

Name	Display Name	Info
search_query	Search Query	The search query for arXiv papers, for example, 'quantum computing'.
search_type	Search Field	The field to search in.
max_results	Max Results	Maximum number of results to return.

Name	Type	Description
tool_name	String	The name of the tool
tool_description	String	The description of the tool
namespace	String	The namespace within Astra where the collection is stored (default: "default_keyspace")
collection_name	String	The name of the collection within Astra DB
token	SecretString	Authentication token for accessing Astra DB
api_endpoint	String	API endpoint URL for the Astra DB service
projection_attributes	String	Attributes to return, separated by commas (default: "*")
tool_params	List[Dict]	Attributes to filter and description for the model
static_filters	List[Dict]	Attributes to filter and corresponding values
number_of_results	Integer	Number of results to return (default: 5)

Name	Type	Description
bing_subscription_key	SecretString	Bing API subscription key
input_value	String	Search query input
bing_search_url	String	Custom Bing Search URL (optional)
k	Integer	Number of search results to return

Name	Type	Description
results	List[Data]	List of search results
tool	Tool	Bing Search tool for use in LangChain

Name	Display Name	Info
input_value	Search Query	The search query to execute with DuckDuckGo.
max_results	Max Results	The maximum number of search results to return. Default: `5`.
max_snippet_length	Max Snippet Length	The maximum length of each result snippet. Default: `100`.

Name	Display Name	Info
data	Data	List of search results as Data objects containing snippets and full content.
text	Text	Search results formatted as a single text string.

Name	Display Name	Info
metaphor_api_key	Exa Search API Key	API key for Exa Search, entered as a password.
use_autoprompt	Use Autoprompt	Whether to use the autoprompt feature. (default: true)
search_num_results	Search Number of Results	Number of results to return for search. (default: 5)
similar_num_results	Similar Number of Results	Number of similar results to return. (default: 5)

Name	Type	Description
glean_api_url	String	URL of the Glean API
glean_access_token	SecretString	Access token for Glean API authentication
query	String	Search query input
page_size	Integer	Number of results per page (default: 10)
request_options	Dict	Additional options for the API request (optional)

Name	Type	Description
google_api_key	SecretString	Google API key for authentication
google_cse_id	SecretString	Google Custom Search Engine ID
input_value	String	Search query input
k	Integer	Number of search results to return

Name	Type	Description
serper_api_key	SecretString	API key for Serper.dev authentication
input_value	String	Search query input
k	Integer	Number of search results to return

Inputs
Name	Type	Description	Required	Default
api_key	SecretString	Tavily API Key	Yes	-
query	String	Search query	Yes	-
search_depth	Enum	Depth of search (BASIC/ADVANCED)	No	BASIC
topic	Enum	Search category (GENERAL/NEWS)	No	GENERAL
max_results	Integer	Maximum number of results	No	5
include_images	Boolean	Include related images	No	False
include_answer	Boolean	Include short answer	No	False

Name	Type	Description
tool_code	String	Python code for the tool’s dataclass
tool_name	String	Name of the tool
tool_description	String	Description of the tool
return_direct	Boolean	Whether to return the function output directly
tool_function	String	Selected function for the tool
global_variables	Dict	Global variables or data for the tool

Name	Type	Description
name	String	The name of the tool (default: "python_repl")
description	String	A description of the tool’s functionality
global_imports	List[String]	List of modules to import globally (default: ["math"])

Name	Type	Description
retriever	BaseRetriever	The retriever to interact with
name	String	The name of the tool
description	String	A description of the tool’s functionality

Name	Type	Description
url	String	The URL of the SearXNG instance
max_results	Integer	Maximum number of results to return
categories	List[String]	Categories to search in
language	String	Language for the search results

Name	Display Name	Info
engine	Engine	The search engine to use (default: "google")
api_key	SearchAPI API Key	The API key for authenticating with SearchAPI
input_value	Input	The search query or input for the API call
search_params	Search parameters	Additional parameters for customizing the search

Name	Display Name	Info
data	Search Results	List of Data objects containing search results
tool	Search API Tool	A Tool object for use in LangChain workflows

Name	Type	Description
serpapi_api_key	SecretString	API key for Serp API authentication
input_value	String	Search query input
search_params	Dict	Additional search parameters (optional)

Name	Display Name	Info
data	Data	The search results from Wikidata API as a list of Data objects.
text	Message	The search results formatted as a text message.

Name	Type	Description
results	List[Data]	List of Wikipedia search results
tool	Tool	Wikipedia search tool for use in LangChain

Name	Type	Description
input_value	String	Query input for Wolfram Alpha
app_id	SecretString	Wolfram Alpha API App ID

Tools

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Name	Type	Description
results	List[Data]	List containing the Wolfram Alpha API response
tool	Tool	Wolfram Alpha API tool for use in LangChain