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<!-- -->
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<p>Configure tools connected to agents to extend their capabilities.</p>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="edit-a-tool-components-actions">Edit a tool component's actions<a href="#edit-a-tool-components-actions" class="hash-link" aria-label="Direct link to Edit a tool component's actions" title="Direct link to Edit a tool component's actions"></a></h2>
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<p>To edit a tool's actions, in the tool component, click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-sliders-horizontal" aria-hidden="true"><line x1="21" x2="14" y1="4" y2="4"></line><line x1="10" x2="3" y1="4" y2="4"></line><line x1="21" x2="12" y1="12" y2="12"></line><line x1="8" x2="3" y1="12" y2="12"></line><line x1="21" x2="16" y1="20" y2="20"></line><line x1="12" x2="3" y1="20" y2="20"></line><line x1="14" x2="14" y1="2" y2="6"></line><line x1="8" x2="8" y1="10" y2="14"></line><line x1="16" x2="16" y1="18" y2="22"></line></svg> <strong>Edit Tools</strong> to modify its <code>name</code>, <code>description</code>, or <code>enabled</code> metadata.
|
||
These fields help connected agents understand how to use the action, without having to modify the agent's prompt instructions.</p>
|
||
<p>For example, the <a href="/components-data#url">URL</a> component has two actions available when <strong>Tool Mode</strong> is enabled:</p>
|
||
<table><thead><tr><th>Tool Name</th><th>Description</th><th>Enabled</th></tr></thead><tbody><tr><td><code>fetch_content</code></td><td>Fetch content from web pages recursively</td><td>true</td></tr><tr><td><code>fetch_content_as_message</code></td><td>Fetch web content formatted as messages</td><td>true</td></tr></tbody></table>
|
||
<p>A Langflow Agent has a clear idea of each tool's capabilities based on the <code>name</code> and <code>description</code> metadata. The <code>enabled</code> boolean controls the tool's availability to the agent. If you think an agent is using a tool incorrectly, edit a tool's <code>description</code> metadata to help the agent better understand the tool.</p>
|
||
<p>Tool names and descriptions can be edited, but the default tool identifiers cannot be changed. If you want to change the tool identifier, create a custom component.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="use-an-agent-as-a-tool">Use an agent as a tool<a href="#use-an-agent-as-a-tool" class="hash-link" aria-label="Direct link to Use an agent as a tool" title="Direct link to Use an agent as a tool"></a></h2>
|
||
<p>The agent component itself also supports <strong>Tool Mode</strong> for creating multi-agent flows.</p>
|
||
<p>Add an agent to your flow that uses a different OpenAI model for a larger context window.</p>
|
||
<ol>
|
||
<li>Create the <a href="/simple-agent">Simple agent starter flow</a>.</li>
|
||
<li>Add a second agent component to the flow.</li>
|
||
<li>Add your <strong>OpenAI API Key</strong> to the <strong>Agent</strong> component.</li>
|
||
<li>In the <strong>Model Name</strong> field, select <code>gpt-4.1</code>.</li>
|
||
<li>Click <strong>Tool Mode</strong> to use this new agent as a tool.</li>
|
||
<li>Connect the new agent's <strong>Toolset</strong> port to the previously created agent's <strong>Tools</strong> port.
|
||
The new agent will use <code>gpt-4.1</code> for the larger tasks of scraping and searching information that require large context windows.
|
||
The previously created agent will now use this agent as a tool, with its unique LLM and toolset.</li>
|
||
</ol>
|
||
<p><img decoding="async" loading="lazy" alt="Agent as a tool" src="/assets/images/agent-example-agent-as-tool-0e0b6761f97ce60d6b2476dc4188d37c.png" width="4000" height="2600" class="img_ev3q"></p>
|
||
<ol start="7">
|
||
<li>The new agent's actions can be edited to help the agent understand how to use it.
|
||
Click <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-sliders-horizontal" aria-hidden="true"><line x1="21" x2="14" y1="4" y2="4"></line><line x1="10" x2="3" y1="4" y2="4"></line><line x1="21" x2="12" y1="12" y2="12"></line><line x1="8" x2="3" y1="12" y2="12"></line><line x1="21" x2="16" y1="20" y2="20"></line><line x1="12" x2="3" y1="20" y2="20"></line><line x1="14" x2="14" y1="2" y2="6"></line><line x1="8" x2="8" y1="10" y2="14"></line><line x1="16" x2="16" y1="18" y2="22"></line></svg> <strong>Edit Tools</strong> to modify its <code>name</code>, <code>description</code>, or <code>enabled</code> metadata.
|
||
For example, the default tool name is <code>Agent</code>. Edit the name to <code>Agent-gpt-41</code>, and edit the description to <code>Use the gpt-4.1 model for complex problem solving</code>. The connected agent will understand that this is the <code>gpt-4.1</code> agent, and will use it for tasks requiring a larger context window.</li>
|
||
</ol>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="components-as-tools">Add custom components as tools<a href="#components-as-tools" class="hash-link" aria-label="Direct link to Add custom components as tools" title="Direct link to Add custom components as tools"></a></h2>
|
||
<p>An agent can use <a href="/components-custom-components">custom components</a> as tools.</p>
|
||
<ol>
|
||
<li>
|
||
<p>To add a custom component to the agent flow, click <strong>New Custom Component</strong>.</p>
|
||
</li>
|
||
<li>
|
||
<p>Enter Python code into the <strong>Code</strong> pane to create the custom component.</p>
|
||
<p>If you don't already have code for a custom component, you can use the following code snippet as an example before creating your own.</p>
|
||
<details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>Text Analyzer custom component</summary><div><div class="collapsibleContent_i85q"><p>This code creates a text analyzer component.</p><div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span>from langflow.custom import Component</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span>from langflow.io import MessageTextInput, Output</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span>from langflow.schema import Data</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span>import re</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span>class TextAnalyzerComponent(Component):</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> display_name = "Text Analyzer"</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> description = "Analyzes and transforms input text."</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> documentation: str = "http://docs.langflow.org/components/custom"</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> icon = "chart-bar"</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> name = "TextAnalyzerComponent"</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> inputs = [</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> MessageTextInput(</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> name="input_text",</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> display_name="Input Text",</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> info="Enter text to analyze",</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> value="Hello, World!",</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> tool_mode=True,</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> ),</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> ]</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> outputs = [</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> Output(display_name="Analysis Result", name="output", method="analyze_text"),</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> ]</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> def analyze_text(self) -> Data:</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> text = self.input_text</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> # Perform text analysis</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> word_count = len(text.split())</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> char_count = len(text)</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> sentence_count = len(re.findall(r'\w+[.!?]', text))</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> # Transform text</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> reversed_text = text[::-1]</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> uppercase_text = text.upper()</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> analysis_result = {</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> "original_text": text,</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> "word_count": word_count,</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> "character_count": char_count,</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> "sentence_count": sentence_count,</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> "reversed_text": reversed_text,</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> "uppercase_text": uppercase_text</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> }</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> data = Data(value=analysis_result)</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> self.status = data</span></div></div><div><span class="ch-code-line-number">_<!-- -->50</span><div style="display:inline-block;margin-left:16px"><span> return data</span></div></div><br></code></div></div></div></div></details>
|
||
</li>
|
||
<li>
|
||
<p>To use the custom component as a tool, click <strong>Tool Mode</strong>.</p>
|
||
</li>
|
||
<li>
|
||
<p>Connect the custom component's tool output to the agent's tools input.</p>
|
||
</li>
|
||
<li>
|
||
<p>Open the <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-play" aria-hidden="true"><polygon points="6 3 20 12 6 21 6 3"></polygon></svg> <strong>Playground</strong> and instruct the agent, <code>Use the text analyzer on this text: "Agents really are thinking machines!"</code></p>
|
||
<p>Based on your instruction, the agent should call the <code>analyze_text</code> action and return the result.
|
||
For example:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>gpt-4o</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Finished</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>0.6s</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Here is the analysis of the text "Agents really are thinking machines!":</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Original Text: Agents really are thinking machines!</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Word Count: 5</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Character Count: 36</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Sentence Count: 1</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Reversed Text: !senihcam gnikniht era yllaer stnegA</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Uppercase Text: AGENTS REALLY ARE THINKING MACHINES!</span></div></div><br></code></div></div>
|
||
</li>
|
||
</ol>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="make-any-component-a-tool">Make any component a tool<a href="#make-any-component-a-tool" class="hash-link" aria-label="Direct link to Make any component a tool" title="Direct link to Make any component a tool"></a></h2>
|
||
<p>If the component you want to use as a tool doesn't have a <strong>Tool Mode</strong> button, add <code>tool_mode=True</code> to one of the component's inputs, and connect the new <strong>Toolset</strong> output to the agent's <strong>Tools</strong> input.</p>
|
||
<p>Langflow supports <strong>Tool Mode</strong> for the following data types:</p>
|
||
<ul>
|
||
<li><code>DataInput</code></li>
|
||
<li><code>DataFrameInput</code></li>
|
||
<li><code>PromptInput</code></li>
|
||
<li><code>MessageTextInput</code></li>
|
||
<li><code>MultilineInput</code></li>
|
||
<li><code>DropdownInput</code></li>
|
||
</ul>
|
||
<p>For example, the <a href="#components-as-tools">components as tools</a> example above adds <code>tool_mode=True</code> to the <code>MessageTextInput</code> input so the custom component can be used as a tool.</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>inputs = [</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> MessageTextInput(</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> name="input_text",</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> display_name="Input Text",</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> info="Enter text to analyze",</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> value="Hello, World!",</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> tool_mode=True,</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> ),</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>]</span></div></div><br></code></div></div>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="use-flows-as-tools">Use flows as tools<a href="#use-flows-as-tools" class="hash-link" aria-label="Direct link to Use flows as tools" title="Direct link to Use flows as tools"></a></h2>
|
||
<p>An agent can use flows that are saved in your workspace as tools with the <a href="/components-logic#run-flow">Run flow</a> component.</p>
|
||
<ol>
|
||
<li>To add a <strong>Run flow</strong> component, click and drag a <strong>Run flow</strong> component to your workspace.</li>
|
||
<li>Select the flow you want the agent to use as a tool.</li>
|
||
<li>Enable <strong>Tool Mode</strong> in the component.
|
||
The <strong>Run flow</strong> component displays your flow as an available action.</li>
|
||
<li>Connect the <strong>Run flow</strong> component's tool output to the agent's tools input.</li>
|
||
<li>Ask the agent, <code>What tools are you using to answer my questions?</code>
|
||
Your flow should be visible in the response as a tool.</li>
|
||
<li>Ask the agent to specifically use the connected tool to answer your question.
|
||
The connected flow returns an answer based on your question.
|
||
For example, a Basic Prompting flow connected as a tool returns a different result depending upon its LLM and prompt instructions.</li>
|
||
</ol>
|
||
<p><img decoding="async" loading="lazy" alt="Run Flow as tool connected to an agent" src="/assets/images/agent-example-run-flow-as-tool-d9830a35be2ea5ac0fc76e1e3cc5692b.png" width="4000" height="2860" class="img_ev3q"></p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="see-also">See also<a href="#see-also" class="hash-link" aria-label="Direct link to See also" title="Direct link to See also"></a></h2>
|
||
<ul>
|
||
<li><a href="/components-agents"><strong>Agent</strong> and <strong>MCP Tools</strong> components</a></li>
|
||
<li><a href="/agents">Use Langflow agents</a></li>
|
||
<li><a href="/mcp-client">Use Langflow as an MCP client</a></li>
|
||
<li><a href="/mcp-server">Use Langflow as an MCP server</a></li>
|
||
</ul></div></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/agents"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Use Langflow agents</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/mcp-client"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Use Langflow as an MCP client</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#edit-a-tool-components-actions" class="table-of-contents__link toc-highlight">Edit a tool component's actions</a></li><li><a href="#use-an-agent-as-a-tool" class="table-of-contents__link toc-highlight">Use an agent as a tool</a></li><li><a href="#components-as-tools" class="table-of-contents__link toc-highlight">Add custom components as tools</a></li><li><a href="#make-any-component-a-tool" class="table-of-contents__link toc-highlight">Make any component a tool</a></li><li><a href="#use-flows-as-tools" class="table-of-contents__link toc-highlight">Use flows as tools</a></li><li><a href="#see-also" class="table-of-contents__link toc-highlight">See also</a></li></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer"><div class="container container-fluid"><div class="row footer__links"><div class="theme-layout-footer-column col footer__col"><div class="footer__title"></div><ul class="footer__items clean-list"><li class="footer__item"><div class="footer-links">
|
||
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|
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