Add example: MCP tool integration (local Ollama)

[sunilp]

Summary

Add a 5th example to the jamjet-benchmarks examples directory that shows how to connect a JamJet workflow to an MCP tool server.

What to build

A self-contained example (05_mcp_tool_call/) that:

• Starts (or connects to) a simple MCP server — e.g. a local file reader or calculator
• Runs a JamJet workflow that calls the MCP tool as a step
• Prints the result with the execution timeline (result.events)

The example should run locally with Ollama (no API key needed), following the same pattern as the existing examples:

• main.py — the workflow
• requirements.txt — jamjet>=0.1.2, openai>=1.0, pydantic>=2.0
• setup.sh — creates .venv, installs deps

Why this is useful

MCP integration is one of JamJet's core differentiators. A working example makes it tangible for developers evaluating the framework.

Resources

• MCP guide
• Existing examples — follow the same structure
• JamJet Python SDK docs

Good first issue?

Yes — this is a self-contained addition with no changes to the core SDK. If you're new to JamJet, the existing examples are the best starting point.