set_parameter_value · Sushi MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_parameter_value does on Sushi MCP Server

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

WHY IT NEEDS A POLICY

Why set_parameter_value needs a policy

This tool modifies the state of an audio processor parameter, which is a reversible write operation. It changes configuration/state but does not delete anything, execute arbitrary code, or involve finances. Misuse could disrupt audio processing but effects are reversible by resetting the parameter.

From the tool's definition 'Set a parameter value on a processor' — creates or modifies a parameter value on an audio processor

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_parameter_value Rate-limited

set_parameter_value 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_parameter_value": {
      "limits": [
        {
          "counter": "set_parameter_value_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about set_parameter_value

What does the set_parameter_value tool do? +

Set a parameter value on a processor. It is categorised as a Write tool in the Sushi 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 set_parameter_value? +

Register the Sushi MCP Server MCP server in PolicyLayer and add a rule for set_parameter_value: 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 Sushi MCP Server. Nothing to install.

What risk level is set_parameter_value? +

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

Can I rate-limit set_parameter_value? +

Yes. Add a rate_limit block to the set_parameter_value 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_parameter_value completely? +

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

set_parameter_value is provided by the Sushi MCP Server MCP server (nagarjun226/sushi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.