set_parameter · ROS 2 MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_parameter does on ROS 2 MCP Server

AI agents use set_parameter to create or update resources in ROS 2 MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ROS 2 MCP Server environment.

WHY IT NEEDS A POLICY

Why set_parameter needs a policy

Based on naming convention and context as a ROS 2 configuration tool, set_parameter modifies system state reversibly by changing parameter values. This is a Write operation. Severity is medium because parameter changes could affect robot behavior, sensor configurations, or safety settings, but the action is reversible (parameters can be reset).

From the tool's definition Tool name 'set_parameter' indicates modification of ROS 2 system parameters. No description provided, but the name strongly suggests creating or updating parameter values.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_parameter Rate-limited

set_parameter 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_parameter": {
      "limits": [
        {
          "counter": "set_parameter_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 2 MCP Server, so you can run agents against it safely.

FAQ

Questions about set_parameter

What does the set_parameter tool do? +

set_parameter. It is categorised as a Write tool in the ROS 2 MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_parameter? +

Register the ROS 2 MCP Server MCP server in PolicyLayer and add a rule for set_parameter: 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 2 MCP Server. Nothing to install.

What risk level is set_parameter? +

set_parameter is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit set_parameter? +

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

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

set_parameter is provided by the ROS 2 MCP Server MCP server (ranch-hand-robotics/rde-mcp-ros-2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.