AI agents call stackchan_listen as a supporting operation in Stackchan workflows.
With no description provided, classification relies solely on the name. 'Listen' implies reading/capturing audio input from the robot's microphone, which would be a Read operation. However, given the empty description and uncertainty about side effects (e.g., recording, triggering actions), confidence is low.
From the tool's definition Tool description is empty and uninformative; tool name 'stackchan_listen' suggests audio/microphone input capture on the Stack-chan robot.
Documented attack patterns abuse exactly the kind of access stackchan_listen gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Stackchan, and nothing reaches the server without passing your rules. This is the rule we recommend for stackchan_listen:
{
"version": "1",
"default": "deny",
"tools": {
"stackchan_listen": {
"limits": [
{
"counter": "stackchan_listen_rate",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
}
}stackchan_listen gets a rate cap, and everything else on the server is denied unless you say otherwise.
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stackchan_listen. It is categorised as a Other tool in the Stackchan MCP Server, which means it performs auxiliary operations.
Register the Stackchan MCP server in PolicyLayer and add a rule for stackchan_listen: 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 Stackchan. Nothing to install.
stackchan_listen 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 stackchan_listen 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 stackchan_listen. 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.
stackchan_listen is provided by the Stackchan MCP server (migratorywhale/stackchan-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Stackchan, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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12 Stackchan tools catalogued and risk-classified — across an index of 43,000+ MCP servers.