AI agents call summarize_directory to retrieve information from Code Summarizer MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Based on the server's stated purpose of summarizing code files and the sibling tool 'summarize_file', 'summarize_directory' almost certainly reads and summarizes the contents of a directory — a read-only operation. The description is empty, which reduces confidence, but the naming convention and server context strongly imply a non-destructive read operation.
From the tool's definition Tool name 'summarize_directory' on a server described as providing 'structured access to codebase content without manual copying' with sibling tools 'summarize_file' and 'set_config'
Documented attack patterns abuse exactly the kind of access summarize_directory gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Code Summarizer MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for summarize_directory:
{
"version": "1",
"default": "deny",
"tools": {
"summarize_directory": {}
}
}summarize_directory is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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summarize_directory. It is categorised as a Read tool in the Code Summarizer MCP MCP Server, which means it retrieves data without modifying state.
Register the Code Summarizer MCP server in PolicyLayer and add a rule for summarize_directory: 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 Summarizer MCP. Nothing to install.
summarize_directory 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 summarize_directory 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 summarize_directory. 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.
summarize_directory is provided by the Code Summarizer MCP server (nicobailon/code-summarizer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Code Summarizer MCP, 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 Code Summarizer MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.