ros2_medkit_prepare_update

THE RISK

High Risk

Why ros2_medkit_prepare_update needs a policy

This tool triggers external operations — downloading, verifying, and staging an update package for a ROS 2 system. These are active operations with side effects (network download, file staging) that prepare system-level changes. While not yet applying the update irreversibly, the staging process executes significant preparatory actions that can affect system state.

From the tool's definition Prepare an update for execution (download, verify, stage)

Documented attack patterns abuse exactly the kind of access ros2_medkit_prepare_update gives an agent:

POLICY

How to control ros2_medkit_prepare_update

PolicyLayer is an MCP gateway — it sits between your AI agents and Ros2 Medkit, and nothing reaches the server without passing your rules. This is the rule we recommend for ros2_medkit_prepare_update:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ros2_medkit_prepare_update": {
      "limits": [
        {
          "counter": "ros2_medkit_prepare_update_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

ros2_medkit_prepare_update 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.

Create a free account and register Ros2 Medkit — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Ros2 Medkit tools

Destructive ros2_medkit_bulkdata_delete Delete a bulk data item. Destructive ros2_medkit_clear_all_faults Clear all faults for a specific entity. WARNING: This clears ALL active faults for the ent Destructive ros2_medkit_delete_all_configurations Reset all configurations (parameters) for an entity to their default values. WARNING: This Destructive ros2_medkit_delete_configuration Reset a configuration (parameter) to its default value. Use ros2_medkit_list_configuration Destructive ros2_medkit_delete_cyclic_sub Delete a cyclic subscription. Destructive ros2_medkit_delete_script Delete a script from an entity. Destructive ros2_medkit_delete_trigger Delete a trigger from an entity. Destructive ros2_medkit_delete_update Delete a registered update.

All 84 Ros2 Medkit tools →

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Go deeper

High-risk tools in Ros2 Medkit → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about ros2_medkit_prepare_update

What does the ros2_medkit_prepare_update tool do? +

Prepare an update for execution (download, verify, stage). It is categorised as a Execute tool in the Ros2 Medkit MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on ros2_medkit_prepare_update? +

Register the Ros2 Medkit MCP server in PolicyLayer and add a rule for ros2_medkit_prepare_update: 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 Ros2 Medkit. Nothing to install.

What risk level is ros2_medkit_prepare_update? +

ros2_medkit_prepare_update is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit ros2_medkit_prepare_update? +

Yes. Add a rate_limit block to the ros2_medkit_prepare_update 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 ros2_medkit_prepare_update completely? +

Set action: deny in the PolicyLayer policy for ros2_medkit_prepare_update. 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 ros2_medkit_prepare_update? +

ros2_medkit_prepare_update is provided by the Ros2 Medkit MCP server (selfpatch/ros2_medkit_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ros2 Medkit tool call.

Start from Ros2 Medkit, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →