Skip to main content

Documentation Index

Fetch the complete documentation index at: https://docs.promptlayer.com/llms.txt

Use this file to discover all available pages before exploring further.

Already have a tool defined inline in a prompt? You don’t need to recreate it in the registry. Save it directly with one click.

​
How It Works

  1. Open a prompt in the Playground that has an inline function tool
  2. Click Save as… on the tool in the functions list
  3. Choose a name and folder location
  4. Click Save
The inline tool definition is saved to the registry, and the inline reference in your prompt is replaced with a registry reference automatically.
Save inline tool to registry

​
When to Use This

Prototyping → Production workflow: You’re iterating on a tool schema in the Playground — tweaking parameters, testing with the LLM, getting it right. Once it works, save it to the registry so other prompts can reuse it. Migrating existing prompts: You have 10 prompts that each define the same get_weather tool inline. Open one, save its tool to the registry, then update the other 9 to use the registry reference instead of their inline copies. Now you have one source of truth.

​
What Happens After Saving

  • A new tool is created in the registry with version 1
  • The tool definition is frozen as the first version
  • Your prompt’s inline tool is replaced with a registry reference
  • The prompt now resolves the tool from the registry at runtime
Only inline function tools show the “Save as…” button. Built-in tools (like web search) and tool variables cannot be saved to the registry.