io.modelcontextprotocol.server

Class McpServerFeatures.AsyncToolSpecification

java.lang.Object

io.modelcontextprotocol.server.McpServerFeatures.AsyncToolSpecification

Enclosing class:

McpServerFeatures

public static class McpServerFeatures.AsyncToolSpecification
extends Object

Specification of a tool with its asynchronous handler function. Tools are the primary way for MCP servers to expose functionality to AI models. Each tool represents a specific capability, such as:

• Performing calculations
• Accessing external APIs
• Querying databases
• Manipulating files
• Executing system commands

Example tool specification:

 new McpServerFeatures.AsyncToolSpecification(
     new Tool(
         "calculator",
         "Performs mathematical calculations",
         new JsonSchemaObject()
             .required("expression")
             .property("expression", JsonSchemaType.STRING)
     ),
     (exchange, args) -> {
         String expr = (String) args.get("expression");
         return Mono.fromSupplier(() -> evaluate(expr))
             .map(result -> new CallToolResult("Result: " + result));
     }
 )
 

Constructor Summary

Constructors

Constructor and Description
AsyncToolSpecification()

Method Summary

Modifier and Type	Method and Description
static McpServerFeatures.AsyncToolSpecification	fromSync(McpServerFeatures.SyncToolSpecification tool)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AsyncToolSpecification

public AsyncToolSpecification()

Method Detail

fromSync

public static McpServerFeatures.AsyncToolSpecification fromSync(McpServerFeatures.SyncToolSpecification tool)