generate_sound_effect · Portals MCP: Risk & Policy

WHAT IT DOES

What generate_sound_effect does on Portals

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

PARAMETERS

Parameter	Type	Required	Description
`text`	string	Yes	Text description of the sound effect to generate (e.g. 'thunder rumble', 'footsteps on gravel').
`duration_seconds`	number	—	Duration of the sound effect in seconds. Omit to let ElevenLabs decide.
`prompt_influence`	number	—	How closely the generation follows the prompt (0.0 to 1.0). Defaults to 0.3.

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why generate_sound_effect needs a policy

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

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_sound_effect Rate-limited

generate_sound_effect 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_sound_effect": {
      "limits": [
        {
          "counter": "generate_sound_effect_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 Portals, so you can run agents against it safely.

FAQ

Questions about generate_sound_effect

What does the generate_sound_effect tool do? +

Generate a sound effect from a text description using ElevenLabs. Returns a URL to the generated audio file (MP3). Costs 60 credits. It is categorised as a Write tool in the Portals MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does generate_sound_effect accept? +

generate_sound_effect accepts 3 parameters: text, duration_seconds, prompt_influence. Required: text. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on generate_sound_effect? +

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

What risk level is generate_sound_effect? +

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

Can I rate-limit generate_sound_effect? +

Yes. Add a rate_limit block to the generate_sound_effect 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_sound_effect completely? +

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

generate_sound_effect is provided by the Portals MCP server (portals-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.