CSC310 Lecture 20

MCP
(20260824)

Transcript

1. CSC 3100 Fundamentals of Software Engineering Lecture 20. Model Context Protocol Dr. Javier Gonzalez-Sanchez javiergs@calpoly.edu www.javiergs.phd ffi o ce: 14 -227
6. Model Context Protocol (MCP) a a a a st nd rd w y to discover nd c ll tools in other a a a a a • MCP gives AI pplic tions softw re.
7. MCP is a restaurant menu Customer Waiter Menu User request Claude MCP tool list Order Kitchen Dish MCP tool call Lambda / REST API Tool result
8. A menu needs descriptions BAD MENU USEFUL MENU Dish 1 convert_temperature Dish 2 “Convert Fahrenheit and Celsius” Dish 3 Inputs: value, from, to
9. MCP: two operations 1 tools/list 2 tools/call Server advertises tool names, descriptions, and input schemas. Claude chooses a tool and supplies validated arguments. Claude chooses the tool. The server executes it.
10. Model Context Protocol (MCP) • In the ex mple Cl ude Desktop discovers the tools the J v server o ers, including get_position, move, nd set_pen. • When Cl ude c lls move with dx = 40 nd dy = 0, the J v server moves the cursor 40 pixels to the right nd returns its new position. If the pen is down, the c nv s shows line. ff a a a a a a a a a a a a a a a a a a a • Cl ude chooses the ction. J v performs it nd reports the result.
11. MCP Paint
12. Architecture
15. Github https://github.com/csc-3100/app-mcp-paint
16. Part I
22. Part II
25. One MCP tool call { "jsonrpc": "2.0", "id": 3, "method": "tools/call", "params": { "name": "move", "arguments": {"dx": 40, "dy": 0} } }
26. Part II
27. Claude Desktop setup · the JAR Install Claude Desktop. Download the runnable JAR from GitHub Releases, or build it from the repository folder with Maven. mvn clean verify java -jar target/mcp-paint-1.0.jar realpath target/mcp-paint-1.0.jar The last command prints the absolute path you’ll paste into Claude’s config.
28. Claude Desktop setup · the con ig ile Open claude_desktop_config.json - macOS - Windows ~/Library/Application Support/Claude %APPDATA%\Claude If mcpServers already exists, add only the mcp-paint entry inside it. Save, fully quit Claude Desktop, and reopen it. { "mcpServers": { "mcp-paint": { "command": "/absolute/path/to/jdk/bin/java", "args": [ "-jar", "/absolute/path/to/mcp-paint-1.0.jar" ] } } } f f Replace both paths with your own.
33. Questions
34. CSC 3100 Fundamentals of Software Engineering Javier Gonzalez-Sanchez, Ph.D. javiergs@calpoly.edu Fall 2026 Copyright Notice. These slides are provided exclusively for educational use in CSC 3100 within the California State University system. Redistribution or use for any other purpose is prohibited without prior written permission.