save_as · Open Brush MCP Server MCP: Risk & Policy

WHAT IT DOES

What save_as does on Open Brush MCP Server

AI agents use save_as to create or update resources in Open Brush MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Open Brush MCP Server environment.

WHY IT NEEDS A POLICY

Why save_as needs a policy

save_as creates or overwrites a scene file with a new name. This is Write-category behavior because: (1) it creates/modifies data (the scene file), (2) it is reversible (the file can be deleted or overwritten), (3) it does not permanently destroy data or execute arbitrary code.

From the tool's definition Tool named 'save_as' described as 'Saves the scene with a new name'. The operation creates or modifies a file (the saved scene), which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_as Rate-limited

save_as 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": {
    "save_as": {
      "limits": [
        {
          "counter": "save_as_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Open Brush MCP Server, so you can run agents against it safely.

FAQ

Questions about save_as

What does the save_as tool do? +

Saves the scene with a new name. It is categorised as a Write tool in the Open Brush MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on save_as? +

Register the Open Brush MCP Server MCP server in PolicyLayer and add a rule for save_as: 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 Open Brush MCP Server. Nothing to install.

What risk level is save_as? +

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

Can I rate-limit save_as? +

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

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

save_as is provided by the Open Brush MCP Server MCP server (moz411/openbrush-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.