dictionary_list

THE RISK

Low Risk

Why dictionary_list needs a policy

This tool only queries and returns a list of dictionary entries. It performs no creation, modification, deletion, or execution of code/commands. The blast radius of misuse is minimal—an agent could only learn what pronunciation mappings exist in the system, which is informational only.

From the tool's definition Tool name 'dictionary_list' and description 'List all dictionary entries' indicate a read-only operation that retrieves and enumerates existing pronunciation dictionary entries without modification or side effects.

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

POLICY

How to control dictionary_list

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dictionary_list": {}
  }
}

dictionary_list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register VOICEPEAK 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More VOICEPEAK MCP Server tools

Destructive dictionary_clear Clear all dictionary entries Destructive dictionary_remove Remove a dictionary entry Execute play Play a synthesized audio file Execute synthesize_and_play Synthesize speech from text and immediately play it (max 140 characters per synthesis) Write synthesize Synthesize speech from text using VOICEPEAK (max 140 characters per synthesis) Write dictionary_add Add or update a dictionary entry for custom pronunciation Read dictionary_find Find dictionary entries by surface form Read list_emotions List available emotions for a narrator

All 10 VOICEPEAK MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about dictionary_list

What does the dictionary_list tool do? +

List all dictionary entries. It is categorised as a Read tool in the VOICEPEAK MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on dictionary_list? +

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

What risk level is dictionary_list? +

dictionary_list is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit dictionary_list? +

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

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

dictionary_list is provided by the VOICEPEAK MCP Server MCP server (k2wanko/voicepeak-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every VOICEPEAK MCP Server tool call.

Start from VOICEPEAK 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 →