undo_mutation
Undo a specific mutation by receipt ID. Inverts: playlist_items add→remove, library save→remove. Non-reversible kinds return not reversible. Supports dry_run.
This record as markdown: /tools/novalux12-spotify-mcp/undo-mutation.md
What undo_mutation does on Spotify
AI agents call undo_mutation to permanently remove resources in Spotify, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why undo_mutation is rated Critical
An AI agent that decides to call undo_mutation doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Spotify is gone. There is no undo for destructive operations.
Attacks that exploit this kind of access
The rule that runs undo_mutation safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Spotify, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For undo_mutation, this is the rule to start with:
undo_mutation is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Spotify, apply this rule, and every undo_mutation call is checked against it from then on.
Questions about undo_mutation
Undo a specific mutation by receipt ID. Inverts: playlist_items add→remove, library save→remove. Non-reversible kinds return not reversible. Supports dry_run. It is categorised as a Destructive tool in the Spotify MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Spotify MCP server in PolicyLayer and add a rule for undo_mutation: 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 Spotify. Nothing to install.
undo_mutation is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the undo_mutation 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 undo_mutation. 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.
undo_mutation is provided by the Spotify MCP server (@novalux12/spotify-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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