AI agents call listFiles to retrieve information from Claude Debugs For You without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves directory or file listings without side effects. Even in a debugging context where an LLM could theoretically misuse it to enumerate system files, the blast radius is limited to information disclosure. No data is modified, deleted, or executed. The lack of description lowers confidence slightly, but the name strongly indicates a read-only operation.
From the tool's definition Tool name 'listFiles' indicates listing/retrieval of file information with no modification capability. The server context (code debugging) and sibling tool 'getFileContent' suggest this is a navigation/discovery utility.
Documented attack patterns abuse exactly the kind of access listFiles gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Claude Debugs For You, and nothing reaches the server without passing your rules. This is the rule we recommend for listFiles:
{
"version": "1",
"default": "deny",
"tools": {
"listFiles": {}
}
}listFiles is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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listFiles. It is categorised as a Read tool in the Claude Debugs For You MCP Server, which means it retrieves data without modifying state.
Register the Claude Debugs For You MCP server in PolicyLayer and add a rule for listFiles: 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 Claude Debugs For You. Nothing to install.
listFiles 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 listFiles 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 listFiles. 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.
listFiles is provided by the Claude Debugs For You MCP server (jasonjmcghee/claude-debugs-for-you). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Claude Debugs For You, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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3 Claude Debugs For You tools catalogued and risk-classified — across an index of 43,000+ MCP servers.