modul 2 — the toolbox in depth
MCP: the agent's door to the world
Out of the box the agent sees your files and your terminal. MCP is the open standard that connects it to everything else – databases, issue trackers, invoicing, search.
~2 min read · ~10 min with the exercise · v1.1 · verified: 2026-07-15
the boundary of the built-in tools
Everything so far happened inside one boundary: the agent reads files, runs commands, edits code, on your machine, in your repo. But real products live in external systems too: the database, the payment provider, the issue tracker, the docs of the library you're using. Until now your answer was copy-paste: you fetched the data and pasted it into the conversation.
MCP (Model Context Protocol – an open standard through which AI applications connect to external tools and data sources) removes the courier job. It's an open-source standard "for connecting AI applications to external systems" – and the signal to reach for it is precise (official docs): "connect a server when you find yourself copying data into chat from another tool".