// MCP TOOL REFERENCE

create_flowspeech

ServerListenHub MCP Server
CategoryExecute

WHAT IT DOES

What create_flowspeech does on ListenHub MCP Server

AI agents invoke create_flowspeech to trigger actions in ListenHub MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

THE RISK

High Risk

Why create_flowspeech needs a policy

This tool triggers an external audio generation operation (text-to-speech conversion) that involves processing content and producing an output artifact. It's not purely a write (data storage), but rather an execution of an AI-enhanced pipeline that fetches/processes URL content or text and generates audio. The 'smart mode' with AI enhancement and automatic polling indicates an active execution process.

From the tool's definition Create a FlowSpeech episode by converting text or URL content to speech... will automatically poll until generation is complete

Documented attack patterns abuse exactly the kind of access create_flowspeech gives an agent:

POLICY

How to control create_flowspeech

PolicyLayer is an MCP gateway — it sits between your AI agents and ListenHub MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_flowspeech:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_flowspeech": {
      "limits": [
        {
          "counter": "create_flowspeech_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

create_flowspeech stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register ListenHub MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More ListenHub MCP Server tools

Execute create_podcast Create a podcast episode with full generation (text + audio). Supports single-speaker (sol Execute generate_podcast_audio Generate audio for a podcast episode that already has text content. This is the second sta Write create_podcast_text_only Create podcast episode with text content only (no audio generation). Supports single-speak Read get_flowspeech_status Query detailed information of a FlowSpeech episode, including generation status, audio URL Read get_podcast_status Query detailed information of a podcast episode, including generation status, audio URLs, Read get_speakers Get list of available published speakers for podcast generation. Supports filtering by lan Read get_user_subscription Get current user subscription information, including subscription status, credit usage, pl

All 8 ListenHub MCP Server tools →

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Go deeper

High-risk tools in ListenHub MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_flowspeech

What does the create_flowspeech tool do? +

Create a FlowSpeech episode by converting text or URL content to speech. Supports smart mode (AI-enhanced, fixes grammar) and direct mode (no modifications). This tool will automatically poll until generation is complete. It is categorised as a Execute tool in the ListenHub MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on create_flowspeech? +

Register the ListenHub MCP Server MCP server in PolicyLayer and add a rule for create_flowspeech: 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 ListenHub MCP Server. Nothing to install.

What risk level is create_flowspeech? +

create_flowspeech is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit create_flowspeech? +

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

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

create_flowspeech is provided by the ListenHub MCP Server MCP server (marswaveai/listenhub-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ListenHub MCP Server tool call.

Start from ListenHub MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

8 ListenHub MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.