AI agents call get_scale_notes to retrieve information from Orpheus without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns harmonic information (diatonic notes) to inform other operations. It does not execute commands, create/modify project state, delete data, or commit financial obligations. It is a pure read operation that provides reference data for downstream music generation tasks.
From the tool's definition Tool retrieves MIDI notes for a given key/mode to keep generated notes diatonic. The verb 'get' and the phrase 'notes for a key/mode' indicate data retrieval with no side effects.
Attacks that exploit this kind of access
MIDI notes for a key/mode so generated notes stay diatonic. It is categorised as a Read tool in the Orpheus MCP Server, which means it retrieves data without modifying state.
Register the Orpheus MCP server in PolicyLayer and add a rule for get_scale_notes: 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 Orpheus. Nothing to install.
get_scale_notes is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_scale_notes 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.
Set action: deny in the PolicyLayer policy for get_scale_notes. 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.
get_scale_notes is provided by the Orpheus MCP server (mal0ware/orpheus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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