A way to feed the ReAct agent expert knowledge

Custom Tools are reusable prompt templates that get injected into the ReAct agent's system prompt. Register things like "how to use the internal API," "search workflow," or "domain runbook" and the agent reasons with that knowledge in scope. * Auto-invocation from normal AI Chat and JSON-schema / function-call style execution are on the roadmap.

Prompt registryTool = extra system prompt

ReusableAcross multiple sessions

ReAct readyAuto-referenced by the agent

Register a tool

Save tool name, description, and the system prompt content — and it appears in your list.

Use with the ReAct agent

Selected tools get folded into the ReAct agent's context for multi-step reasoning.

Per-scope sharing

Private / group-only / public — three levels. Run a team-wide tool set if you need.

Reuse across sessions

Defined once, ready in every ReAct agent session.

Extra context for the ReAct agentShared team prompt templatesPublic knowledge distributionDomain expertise injectionTemplatizing repeated tasks

Basic usage

Open the tool manager

Reach the custom tools screen from AI Chat.

Register a tool

Enter name, description, and system prompt content. Pick a scope (private / group / public). Save.

Select tools in ReAct mode

In AI Chat's ReAct agent mode, check the tools you want active for the session.

Agent references them

The ReAct agent uses the selected tool's system prompt when reasoning and replying.

Pairs with other features

Custom Tools are currently ReAct-only. Group scoping lets a team share the same set.

ReAct agent

PREMIUM

Selected tools become part of the agent's context for multi-step reasoning.

Learn about the agent →

Group chat

Group-scoped tools are available to every member — handy as a team-wide prompt template library.

Learn about groups →

Create a custom tool now

One-minute signup. Build and share expert prompt templates for the ReAct agent.

Start free View pricing