AI agents call gated_echo as a supporting operation in Executor workflows.
This tool echoes a value back (essentially a read/no-op operation) but with a human-in-the-loop approval gate. The core action is simply returning/displaying a value with no side effects, making it closest to 'Other' since it's primarily a passthrough/confirmation tool. The approval mechanism reduces risk further. Low severity as misuse would only result in echoing arbitrary values.
From the tool's definition Asks for approval before echoing a value
Documented attack patterns abuse exactly the kind of access gated_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 gated_echo:
{
"version": "1",
"default": "deny",
"tools": {
"gated_echo": {
"limits": [
{
"counter": "gated_echo_rate",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
}
}gated_echo gets a rate cap, and everything else on the server is denied unless you say otherwise.
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Asks for approval before echoing a value. It is categorised as a Other tool in the Executor MCP Server, which means it performs auxiliary operations.
Register the Executor MCP server in PolicyLayer and add a rule for gated_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.
gated_echo is a Other tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the gated_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 gated_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.
gated_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.
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29 Executor tools catalogued and risk-classified — across an index of 42,500+ MCP servers.