create_arc

A write tool on the Aos MCP server.

SERVERAos SOURCE@hybridlabor-api/aos

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/hybridlabor-api-aos/create-arc.md

WHAT IT DOES

What create_arc does on Aos

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

RISK

Why create_arc is rated Medium

The name 'create_arc' implies writing/creating a new geometric entity (an arc) in a SOLIDWORKS model. Based on sibling tools that add mates, patterns, and variables, this server performs CAD modeling operations. Creating geometry is a Write operation. Confidence is reduced due to empty description.

From the tool's definition Tool name 'create_arc' suggests creation of a new arc geometry element; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_arc safely

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

create_arc Rate-limited

create_arc 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": {
    "create_arc": {
      "limits": [
        {
          "counter": "create_arc_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 Aos, apply this rule, and every create_arc call is checked against it from then on.

FAQ

Questions about create_arc

What does the create_arc tool do? +

create_arc is a write tool on the Aos MCP server. It is categorised as a Write tool in the Aos MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_arc? +

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

What risk level is create_arc? +

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

Can I rate-limit create_arc? +

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

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

create_arc is provided by the Aos MCP server (@hybridlabor-api/aos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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