set_shutter · So Dsc MCP: Risk & Policy

WHAT IT DOES

What set_shutter does on So Dsc

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

WHY IT NEEDS A POLICY

Why set_shutter needs a policy

This tool modifies a camera setting (shutter speed) on a Sony DSC camera. It changes a configuration parameter reversibly — the shutter speed can be changed again at any time. No data is deleted, no code is executed, and no financial transaction occurs. It fits the Write category as it updates a device setting.

From the tool's definition Set shutter speed. Strings like "1/250", "1/4", "2", "BULB".

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_shutter Rate-limited

set_shutter 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": {
    "set_shutter": {
      "limits": [
        {
          "counter": "set_shutter_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 So Dsc, so you can run agents against it safely.

FAQ

Questions about set_shutter

What does the set_shutter tool do? +

Set shutter speed. Strings like "1/250", "1/4", "2", "BULB". It is categorised as a Write tool in the So Dsc MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_shutter? +

Register the So Dsc MCP server in PolicyLayer and add a rule for set_shutter: 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 So Dsc. Nothing to install.

What risk level is set_shutter? +

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

Can I rate-limit set_shutter? +

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

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

set_shutter is provided by the So Dsc MCP server (nananek/so-dsc). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.