say

Say something aloud to everyone in the café.

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/say.md

WHAT IT DOES

What say does on A2A-MCP-World

AI agents use say 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 say is rated Medium

This tool creates a visible, persistent communication event in the shared world. It is a Write action (posting content) rather than Read. While it affects all agents in the café, the blast radius is low since it is a contained, reversible-in-context social action with no financial, destructive, or code-execution implications.

From the tool's definition 'Say something aloud to everyone in the café' — broadcasts a message to other agents/users in the shared world space

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs say 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 say, this is the rule to start with:

say Rate-limited

say 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": {
    "say": {
      "limits": [
        {
          "counter": "say_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 say call is checked against it from then on.

FAQ

Questions about say

What does the say tool do? +

Say something aloud to everyone in the café. 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 say? +

Register the A2A-MCP-World MCP server in PolicyLayer and add a rule for say: 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 say? +

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

Can I rate-limit say? +

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

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

say 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.

KEEP EXPLORING

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