Interface McpTool

MCP tool module definition with configuration and handler function.

Represents a registered tool in the Model Context Protocol server that can be invoked by MCP clients. Tools are the primary mechanism for executing operations in response to client requests.

Remarks

This is the runtime representation of an MCP tool after registration. The handler receives JSON-serializable arguments validated against inputSchema and returns a CallToolResult validated against outputSchema.

Tools are typically created using tool factory functions and registered with the MCP server during initialization.

Example

const tool: McpTool = {
  name: "gmail-message-send",
  config: {
    description: "Send an email message",
    inputSchema: { to: { type: "string" }, subject: { type: "string" } },
    outputSchema: { result: { type: "object" } }
  },
  handler: async (args, context) => {
    // Implementation
    return { content: [{ type: "text", text: "Message sent" }] };
  }
};

See

McpPrompt for prompt module definition

interface McpTool {
    config: {
        description: string;
        inputSchema: Record<string, unknown>;
        outputSchema: Record<string, unknown>;
    };
    handler: (
        args: unknown,
        context?: unknown,
    ) => Promise<{ [key: string]: unknown }>;
    name: string;
}

Index

Properties

config handler name

Properties

config

config: {
    description: string;
    inputSchema: Record<string, unknown>;
    outputSchema: Record<string, unknown>;
}

Tool configuration including description and schemas

handler

handler: (
args: unknown,
context?: unknown,
) => Promise<{ [key: string]: unknown }>

Async function that executes the tool operation

name

name: string

Unique tool identifier (e.g., "gmail-message-send", "sheets-values-get")

Interface McpTool

Remarks

Example

See

Index

Properties

Properties

config

handler

name

Settings

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