audio_bus_set_volume

Set the volume (in dB) of a named bus on the global AudioServer. DESTRUCTIVE (project-wide audio state) — gated by confirmation.

SERVERBreakpoint SOURCEbreakpoint-mcp

Medium RISK CLASS

Category Write

Parameters 32 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/breakpoint-mcp/audio-bus-set-volume.md

WHAT IT DOES

What audio_bus_set_volume does on Breakpoint

AI agents use audio_bus_set_volume 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
`bus`	string	Yes	Bus name
`confirm`	boolean	—	Auto-approve this destructive action (skip the confirmation prompt)
`volume_db`	number	Yes	Volume in dB

Parameters from the server's own tool schema.

RISK

Why audio_bus_set_volume is rated Medium

While the description uses 'DESTRUCTIVE', the actual operation is reversible modification of audio bus properties. Setting volume to a different value (even 0 or extreme values) does not destroy data or make irreversible changes—it can be undone by setting the volume again.

From the tool's definition Tool description states 'Set the volume (in dB) of a named bus on the global AudioServer' — a modification operation. The description labels it 'DESTRUCTIVE (project-wide audio state)' but this is reversible: volume can be changed back.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs audio_bus_set_volume 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 audio_bus_set_volume, this is the rule to start with:

audio_bus_set_volume Rate-limited

audio_bus_set_volume 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": {
    "audio_bus_set_volume": {
      "limits": [
        {
          "counter": "audio_bus_set_volume_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 audio_bus_set_volume call is checked against it from then on.

FAQ

Questions about audio_bus_set_volume

What does the audio_bus_set_volume tool do? +

Set the volume (in dB) of a named bus on the global AudioServer. DESTRUCTIVE (project-wide audio state) — gated by confirmation. 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 audio_bus_set_volume accept? +

audio_bus_set_volume accepts 3 parameters: bus, confirm, volume_db. Required: bus, volume_db. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on audio_bus_set_volume? +

Register the Breakpoint MCP server in PolicyLayer and add a rule for audio_bus_set_volume: 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 audio_bus_set_volume? +

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

Can I rate-limit audio_bus_set_volume? +

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

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

audio_bus_set_volume 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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