generate

Compose Music. Spends ElevenLabs credits. Returns audio/* bytes; pass output_path to save them.

SERVERElevenlabs SOURCE@aiwerk/mcp-server-elevenlabs

Medium RISK CLASS

Category Write

Parameters 120 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aiwerk-mcp-server-elevenlabs/generate.md

WHAT IT DOES

What generate does on Elevenlabs

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

Parameter	Type	Required	Description
`seed`	number \| null	—
`prompt`	string \| null	—
`model_id`	string	—
`finetune_id`	string \| null	—
`lyrics_text`	string \| null	—
`output_path`	string	—	Where to write the returned bytes. Relative paths resolve against ELEVENLABS_OUTPUT_DIR. Omit it to get the data inline as base64 (small files only).
`music_prompt`	object	—	Composition plan for the `music_v1` model. Using this field with any other model will result in an error.
`output_format`	string	—	Output format of the generated audio. Formatted as codec_sample_rate_bitrate. Use "auto" (the default) to let the API pick the best format for the selected mode
`sign_with_c2pa`	boolean	—	Whether to sign the generated song with C2PA. Applicable only for mp3 files.
`generation_mode`	object	—
`music_length_ms`	number \| null	—
`composition_plan`	object	—

Parameters from the server's own tool schema.

RISK

Why generate is rated Medium

An AI agent can call generate faster than any human can review: one bad instruction and it creates or modifies resources in Elevenlabs by the hundred, each call as confident as the last.

Risk signalsHigh parameter count (17 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs generate safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Elevenlabs, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For generate, this is the rule to start with:

generate Rate-limited

generate 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": {
    "generate": {
      "limits": [
        {
          "counter": "generate_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 Elevenlabs, apply this rule, and every generate call is checked against it from then on.

FAQ

Questions about generate

What does the generate tool do? +

Compose Music. Spends ElevenLabs credits. Returns audio/* bytes; pass output_path to save them. It is categorised as a Write tool in the Elevenlabs MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does generate accept? +

generate accepts 12 parameters: seed, prompt, model_id, finetune_id, lyrics_text, output_path, music_prompt, output_format, sign_with_c2pa, generation_mode, music_length_ms, composition_plan. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on generate? +

Register the Elevenlabs MCP server in PolicyLayer and add a rule for generate: 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 Elevenlabs. Nothing to install.

What risk level is generate? +

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

Can I rate-limit generate? +

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

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

generate is provided by the Elevenlabs MCP server (@aiwerk/mcp-server-elevenlabs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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