set_tempo · Sushi MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_tempo does on Sushi MCP Server

AI agents use set_tempo 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_tempo needs a policy

The tool creates or modifies audio engine state (tempo setting) reversibly. This is a Write operation rather than Execute because it sets a single parameter rather than executing arbitrary code or commands. Severity is medium because tempo changes affect audio output but do not delete data, trigger external actions, or cause financial impact.

From the tool's definition Tool name: 'set_tempo'; description: 'Set the tempo of Sushi.' This modifies audio engine configuration (tempo parameter) which affects audio playback behavior in real-time.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_tempo Rate-limited

set_tempo 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_tempo": {
      "limits": [
        {
          "counter": "set_tempo_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 Sushi MCP Server, so you can run agents against it safely.

FAQ

Questions about set_tempo

What does the set_tempo tool do? +

Set the tempo of Sushi. 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_tempo? +

Register the Sushi MCP Server MCP server in PolicyLayer and add a rule for set_tempo: 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_tempo? +

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

Can I rate-limit set_tempo? +

Yes. Add a rate_limit block to the set_tempo 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_tempo completely? +

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

set_tempo 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.