Medium Risk

text_to_speech

Convert text to speech audio using Smallest AI's Lightning TTS. Saves the audio file to the specified path. IMPORTANT: Always ask the user where to save the file before calling. Suggest ~/Desktop/<name>.wav as default. Do NOT retry if successful — the file is saved even if inline audio rendering ...

Part of the Smallest MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

AI agents use text_to_speech to create or modify resources in Smallest. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call text_to_speech repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Smallest.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

smallest.yaml
tools:
  text_to_speech:
    rules:
      - action: allow
        rate_limit:
          max: 30
          window: 60

See the full Smallest policy for all 70 tools.

Tool Name text_to_speech
Category Write
MCP Server Smallest MCP Server
Risk Level Medium

View all 70 tools →

Agents calling write-class tools like text_to_speech have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.

What does the text_to_speech tool do? +

Convert text to speech audio using Smallest AI's Lightning TTS. Saves the audio file to the specified path. IMPORTANT: Always ask the user where to save the file before calling. Suggest ~/Desktop/<name>.wav as default. Do NOT retry if successful — the file is saved even if inline audio rendering fails.. It is categorised as a Write tool in the Smallest MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on text_to_speech? +

Add a rule in your Intercept YAML policy under the tools section for text_to_speech. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Smallest MCP server.

What risk level is text_to_speech? +

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

Can I rate-limit text_to_speech? +

Yes. Add a rate_limit block to the text_to_speech rule in your Intercept 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 text_to_speech completely? +

Set action: deny in the Intercept policy for text_to_speech. 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 text_to_speech? +

text_to_speech is provided by the Smallest MCP server (@developer-smallestai/smallest-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Let agents act without letting them run wild.

Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.

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