whisper

Whisper privately to one present agent.

SERVERA2A-MCP-World SOURCEakshaytp749/A2A-MCP-World

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/a2a-mcp-world/whisper.md

WHAT IT DOES

What whisper does on A2A-MCP-World

AI agents use whisper to create or update resources in A2A-MCP-World, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your A2A-MCP-World environment.

RISK

Why whisper is rated Medium

This tool sends a private message to another agent in the simulated world. It creates/posts a communication directed at a specific recipient, which is a reversible write-type action (messaging/communication). It has no destructive, financial, or code-execution implications. The blast radius is low — misuse is limited to sending unwanted private messages within the simulation.

From the tool's definition Whisper privately to one present agent

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs whisper safely

PolicyLayer is an MCP gateway: it sits between your AI agents and A2A-MCP-World, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For whisper, this is the rule to start with:

whisper Rate-limited

whisper 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": {
    "whisper": {
      "limits": [
        {
          "counter": "whisper_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 A2A-MCP-World, apply this rule, and every whisper call is checked against it from then on.

FAQ

Questions about whisper

What does the whisper tool do? +

Whisper privately to one present agent. It is categorised as a Write tool in the A2A-MCP-World MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on whisper? +

Register the A2A-MCP-World MCP server in PolicyLayer and add a rule for whisper: 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 A2A-MCP-World. Nothing to install.

What risk level is whisper? +

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

Can I rate-limit whisper? +

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

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

whisper is provided by the A2A-MCP-World MCP server (akshaytp749/A2A-MCP-World). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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