AI agents use sketch_offset to create or update resources in SolidWorks MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SolidWorks MCP Server environment.
This tool creates new geometric entities (offset curves) within a sketch, which is a write operation that modifies the design but is fully reversible through undo or deletion. It does not execute arbitrary code, delete data irreversibly, or move money. The medium severity reflects that misuse could corrupt a design requiring rework, but the changes remain undoable within SolidWorks' transaction model.
From the tool's definition Tool name 'sketch_offset' and description 'Create offset curves from sketch entities' indicate the tool modifies sketch geometry by creating new offset curves, which are reversible changes to the design model.
Documented attack patterns abuse exactly the kind of access sketch_offset gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SolidWorks MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for sketch_offset:
{
"version": "1",
"default": "deny",
"tools": {
"sketch_offset": {
"limits": [
{
"counter": "sketch_offset_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}sketch_offset 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 offset curves from sketch entities. It is categorised as a Write tool in the SolidWorks MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the SolidWorks MCP Server MCP server in PolicyLayer and add a rule for sketch_offset: 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 SolidWorks MCP Server. Nothing to install.
sketch_offset 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 sketch_offset 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 sketch_offset. 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.
sketch_offset is provided by the SolidWorks MCP Server MCP server (jianzhichun/solidworks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SolidWorks MCP Server, 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 SolidWorks MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.