echo

A other tool on the A2a Cloud MCP server.

SERVERA2a Cloud SOURCErobGetsTheJobDone/a2a-cloud

Low RISK CLASS

Category Other

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/a2a-cloud/echo.md

WHAT IT DOES

What echo does on A2a Cloud

AI agents call echo as a supporting operation in A2a Cloud workflows.

RISK

Why echo is rated Low

The name 'echo' strongly suggests a read/pass-through operation that reflects input back to the caller. With no description to confirm side effects, and given the conventional meaning of echo (no state changes, no execution, no deletion), this is most likely a benign utility. Confidence is lowered due to the empty description.

From the tool's definition Tool name is 'echo' but description is empty or uninformative; conventionally 'echo' simply returns its input unchanged with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs echo safely

PolicyLayer is an MCP gateway: it sits between your AI agents and A2a Cloud, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For echo, this is the rule to start with:

echo Rate-limited

echo gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "echo": {
      "limits": [
        {
          "counter": "echo_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect A2a Cloud, apply this rule, and every echo call is checked against it from then on.

FAQ

Questions about echo

What does the echo tool do? +

echo is a other tool on the A2a Cloud MCP server. It is categorised as a Other tool in the A2a Cloud MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on echo? +

Register the A2a Cloud MCP server in PolicyLayer and add a rule for echo: 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 Cloud. Nothing to install.

What risk level is echo? +

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

Can I rate-limit echo? +

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

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

echo is provided by the A2a Cloud MCP server (robGetsTheJobDone/a2a-cloud). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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