Create a new trigger on an entity. Triggers monitor resources and fire events on change. Required fields in trigger_config:
AI agents use ros2_medkit_create_trigger to create or update resources in Ros2 Medkit — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ros2 Medkit environment.
This tool creates a new persistent trigger configuration on a ROS 2 system entity. While creation is reversible (triggers can typically be deleted), it modifies system state and monitoring behavior. The tool does not execute arbitrary code or delete data, so it falls into the Write category rather than Execute or Destructive.
From the tool's definition Tool name contains 'create' and description states 'Create a new trigger on an entity.' The operation adds a new configuration artifact (a trigger) to a ROS 2 system that will monitor resources and fire events.
Documented attack patterns abuse exactly the kind of access ros2_medkit_create_trigger 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_create_trigger:
{
"version": "1",
"default": "deny",
"tools": {
"ros2_medkit_create_trigger": {
"limits": [
{
"counter": "ros2_medkit_create_trigger_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ros2_medkit_create_trigger stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Create a new trigger on an entity. Triggers monitor resources and fire events on change. Required fields in trigger_config:. It is categorised as a Write tool in the Ros2 Medkit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ros2 Medkit MCP server in PolicyLayer and add a rule for ros2_medkit_create_trigger: 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_create_trigger is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the ros2_medkit_create_trigger 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_create_trigger. 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_create_trigger 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.