unload_xref

卸载外部参照（保留链接但不加载，提高性能）。

SERVERPypi:best Cad SOURCEpypi:best-cad-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-lokmenower-best-cad-mcp/unload-xref.md

WHAT IT DOES

What unload_xref does on Pypi:best Cad

AI agents use unload_xref to create or update resources in Pypi:best Cad, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pypi:best Cad environment.

RISK

Why unload_xref is rated Medium

The tool modifies drawing state by unloading external references—a reversible operation that changes how the drawing loads resources without permanently deleting data or executing arbitrary code. This qualifies as Write rather than Destructive because the link is retained and the action can be undone by reloading the xref.

From the tool's definition unload_xref: 卸载外部参照（保留链接但不加载，提高性能）translates to 'unload external reference (retains link but does not load, improves performance)'. This modifies the state of external references in a CAD drawing by changing their load status.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unload_xref safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Pypi:best Cad, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For unload_xref, this is the rule to start with:

unload_xref Rate-limited

unload_xref 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": {
    "unload_xref": {
      "limits": [
        {
          "counter": "unload_xref_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Pypi:best Cad, apply this rule, and every unload_xref call is checked against it from then on.

FAQ

Questions about unload_xref

What does the unload_xref tool do? +

卸载外部参照（保留链接但不加载，提高性能）。. It is categorised as a Write tool in the Pypi:best Cad MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unload_xref? +

Register the Pypi:best Cad MCP server in PolicyLayer and add a rule for unload_xref: 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 Pypi:best Cad. Nothing to install.

What risk level is unload_xref? +

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

Can I rate-limit unload_xref? +

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

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

unload_xref is provided by the Pypi:best Cad MCP server (pypi:best-cad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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