diff --git a/03-GettingStarted/10-elicitation/README.md b/03-GettingStarted/10-elicitation/README.md new file mode 100644 index 000000000..6f5c9ede7 --- /dev/null +++ b/03-GettingStarted/10-elicitation/README.md @@ -0,0 +1,17 @@ +# Elicitation + +Elicitation is a feature in MCP were you ask the user for more context. This is a powerful features as sometimes you don't have all the information from the start or sometimes a choice the user makes completely changes what should happen next. There's all kinds of scenarios where this is useful from booking scenarios to general workflows + +## Scenarios + +## Messages + +## Server implementation + +## Client implementation + +## Assignment + +## Quiz + +## Summary \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/assets/elicitation.png b/03-GettingStarted/10-elicitation/assets/elicitation.png new file mode 100644 index 000000000..18911a3b6 Binary files /dev/null and b/03-GettingStarted/10-elicitation/assets/elicitation.png differ diff --git a/03-GettingStarted/10-elicitation/code/README.md b/03-GettingStarted/10-elicitation/code/README.md new file mode 100644 index 000000000..33256b90b --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/README.md @@ -0,0 +1,4 @@ +Please select runtime to run the code: + +- [TypeScript](./typescript/README.md) +- [Python](./python/README.md) \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/code/python/README.md b/03-GettingStarted/10-elicitation/code/python/README.md new file mode 100644 index 000000000..11ec2b63b --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/python/README.md @@ -0,0 +1,93 @@ +# Run the code + +This sample demonstrates the use of Elicitation + +## Set up environment + +```sh +python -m venv venv +source ./venv/bin/activate +``` + +## Run server + +```sh +uvicorn server:app +``` + +You should see: + +```text +INFO: Started server process [5016] +INFO: Waiting for application startup. +INFO: Application startup complete. +INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit) +``` + +This should start a server on port 8000. + +## Test out the server in VS Code + +Add an entry like so to *mcp.json*: + +``` +"server": { + "type": "sse", + "url": "http://localhost:8000/sse" + +} +``` + +and start the server. Now try typing the following prompt in the chat: + +```text +Book trip on 2025-02-01 +``` + +This prompt should trigger an Elicitation scenario where you're asked for more input. Typing "2025-01-01" should lead to a successful booking: + +![Elicitation example VS Code](../../assets/elicitation.png) + +## Run client + +Run the following command: + +```sh +python client.py +``` + +It should start the client and you should see the following output: + +```text +Available tools: ['book_trip'] +[CLIENT] Received elicitation data: No trips available on 2025-01-02. Would you like to try another date? +[CLIENT]: Selecting alternative date: 2025-01-01 +Result: [SUCCESS] Booked for 2025-01-01 +``` + +Let's highlight a piece of code, the client handler for elicitation as we're hardcoding the responses back to the server: + +```python +async def elicitation_callback_handler(context: RequestContext[ClientSession, None], params: ElicitRequestParams): + print(f"[CLIENT] Received elicitation data: {params.message}") + + # 1. refuses no select other date + # return ElicitResult(action="accept", content={ + # "checkAlternative": False + # }) # should say no booking made, WORKS + + # 2. cancels booking + # return ElicitResult(action="decline"), WORKS + + print("[CLIENT]: Selecting alternative date: 2025-01-01") + + # 3. opts to select another date, 2025-01-01 which leads to a booking + return ElicitResult(action="accept", content={ + "checkAlternative": True, + "alternativeDate": "2025-01-01" + }) # should book 1 jan instead of initial 2nd Jan +``` + +Here we are hardcoding back an "accept" response with a prefilled alternate date that the server will accept. We have also provided other response types like 1) User refuses to select a date which should lead to a response saying no booking has been made. 2) This response is more like the user dismisses the whole dialogue and also this leads to no booking taking place. + +You're encouraged to improve this code by making this user-driven instead of hardcoded and also to try out the different responses to see the difference. diff --git a/03-GettingStarted/10-elicitation/code/python/client.py b/03-GettingStarted/10-elicitation/code/python/client.py new file mode 100644 index 000000000..7b24bdde2 --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/python/client.py @@ -0,0 +1,57 @@ +# TODO add python client + +import asyncio + +from mcp import ClientSession +from mcp.client.sse import sse_client +from mcp.types import ElicitRequestParams, ElicitResult, TextContent +from mcp.shared.context import RequestContext + +async def elicitation_callback_handler(context: RequestContext[ClientSession, None], params: ElicitRequestParams): + print(f"[CLIENT] Received elicitation data: {params.message}") + + # 1. refuses no select other date + # return ElicitResult(action="accept", content={ + # "checkAlternative": False + # }) # should say no booking made, WORKS + + # 2. cancels booking + # return ElicitResult(action="decline"), WORKS + + print("[CLIENT]: Selecting alternative date: 2025-01-01") + + # 3. opts to select another date, 2025-01-01 which leads to a booking + return ElicitResult(action="accept", content={ + "checkAlternative": True, + "alternativeDate": "2025-01-01" + }) # should book 1 jan instead of initial 2nd Jan + + + + +async def main(): + # Connect to a Server-Sent Events (SSE) server + async with sse_client(url="http://localhost:8000/sse") as ( + read_stream, + write_stream + ): + # Create a session using the client streams + async with ClientSession( + read_stream, + write_stream, + elicitation_callback=elicitation_callback_handler) as session: + # Initialize the connection + await session.initialize() + # List available tools + tools = await session.list_tools() + print(f"Available tools: {[tool.name for tool in tools.tools]}") + + # call tool + result = await session.call_tool("book_trip", { + "date": "2025-01-02" + }) + print("Result: ", result.content[0].text) + + +if __name__ == "__main__": + asyncio.run(main()) \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/code/python/server.py b/03-GettingStarted/10-elicitation/code/python/server.py new file mode 100644 index 000000000..6347cc2bf --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/python/server.py @@ -0,0 +1,55 @@ +from pydantic import BaseModel, Field + +from mcp.server.fastmcp import Context, FastMCP +from mcp.server.session import ServerSession + +from starlette.applications import Starlette +from starlette.routing import Mount, Host + +mcp = FastMCP(name="Elicitation Example") + +# todo: elicitation example, turn it into sse + +class BookingPreferences(BaseModel): + """Schema for collecting user preferences.""" + + checkAlternative: bool = Field(description="Would you like to check another date?") + alternativeDate: str = Field( + default="2024-12-26", + description="Alternative date (YYYY-MM-DD)", + ) + +def not_available_date(date: str) -> bool: + # Simulate date availability check + return date != "2024-12-25" + + +@mcp.tool() +async def book_trip(date: str, ctx: Context[ServerSession, None]) -> str: + """Book a trip with date availability check.""" + # Check if date is available + if not_available_date(date): + # Date unavailable - ask user for alternative + result = await ctx.elicit( + message=(f"No trips available on {date}. Would you like to try another date?"), + schema=BookingPreferences, + ) + + if result.action == "accept" and result.data: + if result.data.checkAlternative: + return f"[SUCCESS] Booked for {result.data.alternativeDate}" + return "[CANCELLED] No booking made" + return "[CANCELLED] Booking cancelled" + + # Date available + return f"[SUCCESS] Booked for {date}" + +app = Starlette( + routes=[ + Mount('/', app=mcp.sse_app()), + ] +) + +if __name__ == "__main__": + print("Starting Elicitation Example MCP Server...") + mcp.run() \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/code/typescript/README.md b/03-GettingStarted/10-elicitation/code/typescript/README.md new file mode 100644 index 000000000..ff4eabab5 --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/typescript/README.md @@ -0,0 +1,86 @@ +# Run sample + +Here's how to run this Elicitation sample. + +## Install dependencies + +```sh +npm install +``` + +## Run + +Compile and run the server + +```sh +npm run build +npm start +``` + +That should start a server on `http://localhost:3000`. + +### Run via Visual Studio Code + +Create an entry in `mcp.json` like so: + +```json +"server-elicitation": { + "type": "sse", + "url": "http://localhost:3000/sse" + +} +``` + +Run a prompt like so: + +```text +Make a booking on the "2025-01-02" +``` + +You should see this trigger an elicitation as "2025-01-01" is the only available date. When you're asked for input select "true" and fill in "2025-01-01" this should state that a booking has been made on "2025-01-01". + +![Elicitation in Visual Studio Code](../../assets/elicitation.png) + +### Run the client + +In a separate terminal, run the client + +```sh +npm run client +``` + +```text +No trip available at on 2025-01-02. Would you like to check alternative dates? + +Provide the following information: +[INPUT]: 'checkAlternatives' of type boolean +[INPUT]: 'newDate' of type string +Tool result: { + content: [ + { type: 'text', text: 'Trip booked on alternate date: 2025-01-01' } + ] +} +``` + +NOTE: the client is hard coding a response to the server's eliciation and provide an "accept" message with a filled in date on "2025-01-01", you're recommended to change this code to ask the user for input. Look for this code to change it in *client.ts*: + +```typescript +client.setRequestHandler(ElicitRequestSchema, (params) => { + console.log(`${params.params.message}`); + console.log("\nProvide the following information:"); + let schema = params.params.requestedSchema.properties; + for (let key in schema) { + console.log(`[INPUT]: '${key}' of type ${schema[key].type}`); + } + + // TODO, ask for this input instead of faking the response like below + + return { + action: "accept", + content: { + checkAlternatives: true, + newDate: "2025-01-01" + }, + }; +}); +``` \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/code/typescript/package-lock.json b/03-GettingStarted/10-elicitation/code/typescript/package-lock.json new file mode 100644 index 000000000..b0ac63b29 --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/typescript/package-lock.json @@ -0,0 +1,1481 @@ +{ + "name": "typescript", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + 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a/03-GettingStarted/10-elicitation/code/typescript/package.json b/03-GettingStarted/10-elicitation/code/typescript/package.json new file mode 100644 index 000000000..feaf18f6b --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/typescript/package.json @@ -0,0 +1,27 @@ +{ + "type": "module", + "bin": { + "weather": "./build/index.js" + }, + "scripts": { + "start": "node ./build/index.js", + "build": "tsc", + "client": "node ./build/client.js", + "inspector": "npx @modelcontextprotocol/inspector node build/index.js" + }, + "files": [ + "build" + ], + "dependencies": { + "@modelcontextprotocol/sdk": "^1.8.0", + "express": "^4.21.2", + "type": "^2.7.3", + "uuid": "^11.1.0", + "zod": "^3.24.2" + }, + "devDependencies": { + "@types/node": "^20.11.24", + "@types/uuid": "^10.0.0", + "typescript": "^5.3.3" + } +} diff --git a/03-GettingStarted/10-elicitation/code/typescript/src/client.ts b/03-GettingStarted/10-elicitation/code/typescript/src/client.ts new file mode 100644 index 000000000..2cdc67c6e --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/typescript/src/client.ts @@ -0,0 +1,55 @@ +import { Client } from "@modelcontextprotocol/sdk/client/index.js"; +import { SSEClientTransport } from "@modelcontextprotocol/sdk/client/sse.js"; +import { ElicitRequestSchema } from "@modelcontextprotocol/sdk/types.js" +import { mainModule } from "process"; + + +const client = new Client( + { + name: "test client", + version: "1.0", + }, + { + capabilities: { + elicitation: {}, + }, + }, + ); + +let baseUrl = new URL("http://localhost:3000/sse"); + +const sseTransport = new SSEClientTransport(baseUrl); + +client.setRequestHandler(ElicitRequestSchema, (params) => { + console.log(`${params.params.message}`); + console.log("\nProvide the following information:"); + let schema = params.params.requestedSchema.properties; + for (let key in schema) { + console.log(`[INPUT]: '${key}' of type ${schema[key].type}`); + } + + // TODO, ask for this input instead of faking the response like below + + return { + action: "accept", + content: { + checkAlternatives: true, + newDate: "2025-01-01" + }, + }; +}); + +async function main() { + await client.connect(sseTransport); + const result = await client.callTool({ + name: "book-trip", + arguments: { + date: "2025-01-02" + } + }); + + console.log("Tool result: ", result); +} + +main(); + diff --git a/03-GettingStarted/10-elicitation/code/typescript/src/index.ts b/03-GettingStarted/10-elicitation/code/typescript/src/index.ts new file mode 100644 index 000000000..2330e68b4 --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/typescript/src/index.ts @@ -0,0 +1,127 @@ +import { McpServer, ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js"; +import { SSEServerTransport } from "@modelcontextprotocol/sdk/server/sse.js"; +import { z } from "zod"; +import express from "express"; + +// Create an MCP server +const server = new McpServer({ + name: "Demo", + version: "1.0.0" +}, +{ + "capabilities": { + "elicitation": {} + } +}); + +function checkAvailability(date: string): Promise { + // Simulate checking availability + return Promise.resolve(date === "2025-01-01"); +} + + server.tool( + "book-trip", + { + date: z.string() + }, + async ({ date }) => { + // 1. Check availability + const available = await checkAvailability(date); + + if (!available) { + // 2. Ask user if they want to try alternative dates + const result = await server.server.elicitInput({ + message: `No trip available at on ${date}. Would you like to check alternative dates?`, + requestedSchema: { + type: "object", + properties: { + checkAlternatives: { + type: "boolean", + title: "Alternate date", + description: "Fill in other date" + }, + newDate: { + type: "string", + title: "New Date", + description: "Please provide a new date" + } + }, + required: ["checkAlternatives"] + } + }); + + // 3. Check if user provided a new date + if (result.action === "accept" && result.content?.checkAlternatives) { + let ok = await checkAvailability(result.content?.newDate as string); + if(ok) { + return { + content: [ + { + type: "text", + text: `Trip booked on alternate date: ${result.content?.newDate}` + } + ] + }; + } else { + // 3b. No trip available on new date + return { + content: [ + { + type: "text", + text: `No trip available on ${result.content?.newDate}.` + } + ] + }; + } + } + // 4. User didn't provide a new date + return { + content: [{ + type: "text", + text: "No booking made. Original date not available." + }] + }; + } else { + // 1b. available, confirm booking + return { + content: [{ + type: "text", + text: `Booked trip on ${date}` + }] + }; + } + } +); + +const app = express(); +app.use(express.json()); + +// Store transports for each session type +const transports = { + sse: {} as Record +}; + +app.get('/sse', async (req, res) => { + // Create SSE transport for legacy clients + const transport = new SSEServerTransport('/messages', res); + transports.sse[transport.sessionId] = transport; + + res.on("close", () => { + delete transports.sse[transport.sessionId]; + }); + + await server.connect(transport); +}); + +// Legacy message endpoint for older clients +app.post('/messages', async (req, res) => { + const sessionId = req.query.sessionId as string; + const transport = transports.sse[sessionId]; + if (transport) { + await transport.handlePostMessage(req, res, req.body); + } else { + res.status(400).send('No transport found for sessionId'); + } +}); + +app.listen(3000); \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/code/typescript/tsconfig.json b/03-GettingStarted/10-elicitation/code/typescript/tsconfig.json new file mode 100644 index 000000000..ce7b85bcb --- /dev/null +++ b/03-GettingStarted/10-elicitation/code/typescript/tsconfig.json @@ -0,0 +1,16 @@ +{ + "compilerOptions": { + "target": "ES2022", + "module": "Node16", + "moduleResolution": "Node16", + "outDir": "./build", + "rootDir": "./src", + "strict": true, + "esModuleInterop": true, + "skipLibCheck": true, + "forceConsistentCasingInFileNames": true, + "noImplicitAny": false + }, + "include": ["src/**/*"], + "exclude": ["node_modules"] + } \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/solution/README.md b/03-GettingStarted/10-elicitation/solution/README.md new file mode 100644 index 000000000..3320292c7 --- /dev/null +++ b/03-GettingStarted/10-elicitation/solution/README.md @@ -0,0 +1,4 @@ +Choose your runtime + +- [TypeScript]() +- [Python]() \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/solution/python/README.md b/03-GettingStarted/10-elicitation/solution/python/README.md new file mode 100644 index 000000000..ba4ed54ee --- /dev/null +++ b/03-GettingStarted/10-elicitation/solution/python/README.md @@ -0,0 +1 @@ +# How to run this sample \ No newline at end of file diff --git a/03-GettingStarted/10-elicitation/solution/typescript/README.md b/03-GettingStarted/10-elicitation/solution/typescript/README.md new file mode 100644 index 000000000..ba4ed54ee --- /dev/null +++ b/03-GettingStarted/10-elicitation/solution/typescript/README.md @@ -0,0 +1 @@ +# How to run this sample \ No newline at end of file