Add constraints between sketch entities using SolidWorks API SketchAddConstraints() method. IMPORTANT: This tool automatically ensures an active sketch context before adding constraints. Entity Selection: - Use
AI agents use add_sketch_constraint 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/modifies sketch data by adding geometric constraints between entities in a SolidWorks sketch. It is reversible (constraints can be deleted), making it a Write operation rather than Destructive. Misuse could corrupt sketch geometry or cause over-constrained sketches, hence medium severity.
From the tool's definition Add constraints between sketch entities using SolidWorks API SketchAddConstraints() method
Documented attack patterns abuse exactly the kind of access add_sketch_constraint 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 add_sketch_constraint:
{
"version": "1",
"default": "deny",
"tools": {
"add_sketch_constraint": {
"limits": [
{
"counter": "add_sketch_constraint_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_sketch_constraint 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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Add constraints between sketch entities using SolidWorks API SketchAddConstraints() method. IMPORTANT: This tool automatically ensures an active sketch context before adding constraints. Entity Selection: - Use. 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 add_sketch_constraint: 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.
add_sketch_constraint 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 add_sketch_constraint 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 add_sketch_constraint. 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.
add_sketch_constraint 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.