Tools User Guide

These guides cover declaring tools on an MCP server and controlling what a tool returns. Start with Getting started if you have not registered a tool yet.

Guides

Guide	Scope	API starting points
Defining tools	Registration, the fluent builder, typed input properties, enum constraints, arrays of objects, and the four behaviour hints.	`TTMSMCPTool`, `TTMSMCPToolProperty`, `TTMSMCPToolBuilder`
Tool results	Return types, structured output with a JSON output schema, native MCP content items, and opt-in long-running task execution.	`TTMSMCPContent`, `TTMSMCPTool`, `TTMSMCPJSONSchemaGenerator`

MCP Server owns the Tools collection and answers tools/list and tools/call.
Attributes generates the same tool surface from RTTI attributes, so plain Delphi methods become tools without explicit registration.
Resources exposes readable content by URI, and Prompts exposes reusable prompt templates — the other two things a server advertises alongside tools.

See Also