set_line_time · mcpXL30 MCP: Risk & Policy

WHAT IT DOES

What set_line_time does on mcpXL30

AI agents use set_line_time to create or update resources in mcpXL30 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your mcpXL30 environment.

WHY IT NEEDS A POLICY

Why set_line_time needs a policy

Based on the naming convention 'set_*', this tool likely adjusts a scan or imaging parameter (line time, i.e., the time spent scanning each line of the electron beam). This is a Write operation that modifies a microscope configuration parameter. Severity is medium because misconfiguring scan parameters could affect image quality or beam behavior, but it is unlikely to cause irreversible damage.

From the tool's definition Tool name 'set_line_time' suggests setting a parameter (line time) on the microscope; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_line_time Rate-limited

set_line_time 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_line_time": {
      "limits": [
        {
          "counter": "set_line_time_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 mcpXL30, so you can run agents against it safely.

FAQ

Questions about set_line_time

What does the set_line_time tool do? +

set_line_time. It is categorised as a Write tool in the mcpXL30 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_line_time? +

Register the mcpXL30 MCP server in PolicyLayer and add a rule for set_line_time: 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 mcpXL30. Nothing to install.

What risk level is set_line_time? +

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

Can I rate-limit set_line_time? +

Yes. Add a rate_limit block to the set_line_time 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_line_time completely? +

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

set_line_time is provided by the mcpXL30 MCP server (tspspi/mcpxl30). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.