export_part · Hardware MCP Server MCP: Risk & Policy

WHAT IT DOES

What export_part does on Hardware MCP Server

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

WHY IT NEEDS A POLICY

Why export_part needs a policy

Exporting data to a file is a write operation that creates or modifies data in the file system. It is reversible and has limited blast radius—the worst outcome is an unwanted .stl file being created, which can be easily removed. This does not involve deletion (Destructive), code execution with arbitrary effects (Execute), financial operations, or data destruction.

From the tool's definition Tool description states 'Export part to .stl file', which creates/generates a new file output. The action is reversible (the exported file can be deleted or overwritten).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_part Rate-limited

export_part 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": {
    "export_part": {
      "limits": [
        {
          "counter": "export_part_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 Hardware MCP Server, so you can run agents against it safely.

FAQ

Questions about export_part

What does the export_part tool do? +

Export part to .stl file. This tool call should be called as the last tool call in a chain of tool calls. It is categorised as a Write tool in the Hardware 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 export_part? +

Register the Hardware MCP Server MCP server in PolicyLayer and add a rule for export_part: 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 Hardware MCP Server. Nothing to install.

What risk level is export_part? +

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

Can I rate-limit export_part? +

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

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

export_part is provided by the Hardware MCP Server MCP server (thefloatingstring/mcp-for-hardware). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.