MCP·7 min read
Connecting Tools With MCP: A Walkthrough
From zero to a working tool connection — what MCP gives you and the gotchas to expect.
Connecting Tools With MCP: A Walkthrough
The Model Context Protocol (MCP) is how an agent discovers and uses tools through one standard interface — instead of a bespoke integration per tool.
The mental model
An MCP server exposes capabilities ("search orders," "create ticket"). Your agent connects and asks "what can you do?", then calls what fits the task.
A first connection, step by step
- Pick a read-only server first (data you can see but not change).
- Connect it and list its tools — confirm the names and descriptions read clearly.
- Give the agent a task that needs exactly one of those tools and watch the call.
- Only then add an action server (one that writes or sends).
Gotchas
- Over-broad tools confuse the model — prefer several focused tools.
- Untrusted content from a tool can carry hidden instructions; treat tool output as data, not commands.
- Auth scope — give the narrowest access that does the job.
Start read-only, prove one call, then expand.