Download a bulk-data file (e.g., rosbag recording) to the specified directory. Use the bulk_data_uri from fault environment_data snapshots.
AI agents call ros2_medkit_bulkdata_download to retrieve information from Ros2 Medkit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and saves existing bulk data (rosbag recordings) to a local directory. This is a read-only operation with no side effects on the ROS 2 system or source data. While 'download' involves file I/O, the primary function is data retrieval, not creation, modification, or execution. Severity is low because downloading files poses minimal risk if the URI is legitimate.
From the tool's definition Tool name contains 'download' and description states 'Download a bulk-data file...to the specified directory.' This is a retrieval operation that fetches data without modifying, deleting, or executing code.
Documented attack patterns abuse exactly the kind of access ros2_medkit_bulkdata_download gives an agent:
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_bulkdata_download:
{
"version": "1",
"default": "deny",
"tools": {
"ros2_medkit_bulkdata_download": {}
}
}ros2_medkit_bulkdata_download is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download a bulk-data file (e.g., rosbag recording) to the specified directory. Use the bulk_data_uri from fault environment_data snapshots. It is categorised as a Read tool in the Ros2 Medkit MCP Server, which means it retrieves data without modifying state.
Register the Ros2 Medkit MCP server in PolicyLayer and add a rule for ros2_medkit_bulkdata_download: 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.
ros2_medkit_bulkdata_download is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the ros2_medkit_bulkdata_download 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.
Set action: deny in the PolicyLayer policy for ros2_medkit_bulkdata_download. 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.
ros2_medkit_bulkdata_download 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.
Start from Ros2 Medkit, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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84 Ros2 Medkit tools catalogued and risk-classified — across an index of 43,000+ MCP servers.