AI agents call structured_echo to retrieve information from Executor without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool merely echoes back input as structured output. It performs no data modification, code execution, external operations, or irreversible actions. It is a read-only operation with minimal security risk, suitable for testing or formatting responses.
From the tool's definition The tool 'structured_echo' returns text plus structured data without modifying, executing external operations, or affecting state. The verb 'echo' and description 'Returns' indicate a retrieval/output operation with no side effects.
Documented attack patterns abuse exactly the kind of access structured_echo gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Executor, and nothing reaches the server without passing your rules. This is the rule we recommend for structured_echo:
{
"version": "1",
"default": "deny",
"tools": {
"structured_echo": {}
}
}structured_echo is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Returns text plus structured data. It is categorised as a Read tool in the Executor MCP Server, which means it retrieves data without modifying state.
Register the Executor MCP server in PolicyLayer and add a rule for structured_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 Executor. Nothing to install.
structured_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 structured_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 structured_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.
structured_echo is provided by the Executor MCP server (rhyssullivan/executor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 29 Executor tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
29 Executor tools catalogued and risk-classified — across an index of 42,500+ MCP servers.