Tool Playground

The Tool Playground lets you explore and test MCP server tools without writing any code. Open a server's Tools tab to see all available tools and invoke them with a live form or raw JSON.

What the playground does

• Discovers tools — calls tools/list on the server and shows each tool with its name, description, and input schema
• Generates forms — renders an input form automatically from the JSON Schema, so you don't need to craft raw JSON for simple tools
• Invokes tools — sends a tools/call request through the proxy and shows the result
• Logs invocations — every playground invocation is logged in the audit log with caller_agent = "mcphub-playground", so you can review them later

Accessing the playground

1. Go to Servers
2. Click any server
3. Click the Tools tab (the default tab, shown first)

The tool list loads and is cached for 5 minutes.

Access control

• Viewing tools — available to all workspace members
• Invoking tools — requires admin or owner role

This prevents read-only members from accidentally triggering side effects through tools.

In this section

• Discovering tools
• Invoking tools