primitive_mesh_create

SERVERBreakpoint SOURCEbreakpoint-mcp

Medium RISK CLASS

Category Write

Parameters 41 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/breakpoint-mcp/primitive-mesh-create.md

WHAT IT DOES

What primitive_mesh_create does on Breakpoint

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

Parameter	Type	Required	Description
`shape`	string	—	box \| sphere \| cylinder \| plane \| capsule \| prism \| torus \| quad (default box)
`confirm`	boolean	—	Skip the confirmation prompt (auto-approve)
`to_path`	string	Yes	Destination res:// path, e.g. res://meshes/box.tres
`overwrite`	boolean	—	Replace if it exists

Parameters from the server's own tool schema.

RISK

Why primitive_mesh_create is rated Medium

An AI agent can call primitive_mesh_create faster than any human can review: one bad instruction and it creates or modifies resources in Breakpoint by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs primitive_mesh_create safely

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

primitive_mesh_create Rate-limited

primitive_mesh_create 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": {
    "primitive_mesh_create": {
      "limits": [
        {
          "counter": "primitive_mesh_create_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 Breakpoint, apply this rule, and every primitive_mesh_create call is checked against it from then on.

FAQ

Questions about primitive_mesh_create

What does the primitive_mesh_create tool do? +

Create a PrimitiveMesh resource (box/sphere/cylinder/plane/capsule/prism/torus/quad) and save it to a res:// path. DESTRUCTIVE (writes a file) — gated by confirmation. Assign it with meshinstance_create's 'mesh_path'. It is categorised as a Write tool in the Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does primitive_mesh_create accept? +

primitive_mesh_create accepts 4 parameters: shape, confirm, to_path, overwrite. Required: to_path. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on primitive_mesh_create? +

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

What risk level is primitive_mesh_create? +

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

Can I rate-limit primitive_mesh_create? +

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

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

primitive_mesh_create is provided by the Breakpoint MCP server (breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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