Pricing
00
In productionProbeginnerAgentic safety

The agent's tool publishes a bad type

Make the MCP publish tool validate the message type before sending.

Pairs with MCP and agentic control of ROS in Use AI efficiently with ROS 2. Read the concept first, then diagnose it here.

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Operator report

The agent 'moves' the robot but the base ignores it; the tool published the wrong type on /cmd_vel.

Ubuntu 24.04, ROS 2 Jazzy, rclpy/rclcpp, an LLM coding assistant + MCP

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01agent request→
  2. 02type validation→
  3. 03publisherOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • Type is validated
  • Bad payloads rejected
  • Hidden regression behavior
  • Root cause explanation