Echo back the input text
AI agents call echo to retrieve information from Code Mode Bridge without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Echo is a read operation—it retrieves and returns the provided input with no creation, modification, deletion, or execution of external commands. The tool has minimal blast radius; misuse would only return user-supplied data back to the agent.
From the tool's definition Tool name 'echo' and description 'Echo back the input text' indicate a simple reflection operation that returns the input without modification, side effects, or data access.
Attacks that exploit this kind of access
Echo back the input text. It is categorised as a Read tool in the Code Mode Bridge MCP Server, which means it retrieves data without modifying state.
Register the Code Mode Bridge 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 Code Mode Bridge. 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 Code Mode Bridge MCP server (ruifung/mcp-cm-bridge). 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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