echo · MCP Server Example MCP: Risk & Policy

WHAT IT DOES

What echo does on MCP Server Example

AI agents call echo to retrieve information from MCP Server Example without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why echo needs a policy

An echo tool simply returns whatever input is provided to it, with no side effects, no data modification, and no external operations. It is a read/reflect operation with minimal blast radius. Confidence is moderate because the description is minimal and does not explicitly confirm behavior, but 'echo' is a well-understood concept.

From the tool's definition 'A simple echo tool' - echo tools reflect input back as output

Attacks that exploit this kind of access

Questions about echo

What does the echo tool do? +

A simple echo tool. It is categorised as a Read tool in the MCP Server Example MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on echo? +

Register the MCP Server Example 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 MCP Server Example. Nothing to install.

What risk level is echo? +

echo is a Read 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 MCP Server Example MCP server (sriharsha-gvkss/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.