입력한 메시지를 그대로 반환합니다.
AI agents call echo to retrieve information from MCP Token Tracker without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a simple echo utility that retrieves and returns user input without side effects. It performs no write operations, does not execute code or commands, and does not delete or modify any data. The low severity reflects the minimal risk: even if misused by an agent, an echo function cannot cause harm to the system or data.
From the tool's definition Tool description states it returns the input message as-is (echoes input). No data modification, deletion, or external operations occur.
Attacks that exploit this kind of access
입력한 메시지를 그대로 반환합니다. It is categorised as a Read tool in the MCP Token Tracker MCP Server, which means it retrieves data without modifying state.
Register the MCP Token Tracker 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 Token Tracker. Nothing to install.
echo is a Read tool with low risk. Read-only tools are generally safe to allow by default.
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.
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.
echo is provided by the MCP Token Tracker MCP server (kdkim2000/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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