cancel_navigation · Ros MCP: Risk & Policy

WHAT IT DOES

What cancel_navigation does on Ros

AI agents invoke cancel_navigation to trigger actions in Ros. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why cancel_navigation needs a policy

Cancelling an active navigation task on an Autonomous Mobile Robot (AMR) triggers an external physical operation: it stops the robot mid-navigation. This is an Execute-category action because it causes a real-world state change (robot halts/deviates from its path) that depends on the current system state.

From the tool's definition 'Cancel the active navigation task' — terminates an ongoing real-world robot navigation operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cancel_navigation Rate-limited

cancel_navigation stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cancel_navigation": {
      "limits": [
        {
          "counter": "cancel_navigation_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Ros, so you can run agents against it safely.

FAQ

Questions about cancel_navigation

What does the cancel_navigation tool do? +

Cancel the active navigation task. It is categorised as a Execute tool in the Ros MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cancel_navigation? +

Register the Ros MCP server in PolicyLayer and add a rule for cancel_navigation: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Ros. Nothing to install.

What risk level is cancel_navigation? +

cancel_navigation is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit cancel_navigation? +

Yes. Add a rate_limit block to the cancel_navigation rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block cancel_navigation completely? +

Set action: deny in the PolicyLayer policy for cancel_navigation. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides cancel_navigation? +

cancel_navigation is provided by the Ros MCP server (reidlo5135/ros-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.