AI agents call stat_file to retrieve information from Omni Fs without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves file statistics and metadata (size, timestamps, permissions, etc.) without creating, modifying, deleting, or executing anything. It is a read-only operation with no side effects. The low severity reflects minimal blast radius—an AI agent misusing this tool could only learn metadata about existing files, posing no direct threat to data integrity or system operations.
From the tool's definition Tool name 'stat_file' and description 'Get metadata/statistics for a file or directory' indicate retrieval of file metadata without modification or execution.
Attacks that exploit this kind of access
Get metadata/statistics for a file or directory. It is categorised as a Read tool in the Omni Fs MCP Server, which means it retrieves data without modifying state.
Register the Omni Fs MCP server in PolicyLayer and add a rule for stat_file: 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 Omni Fs. Nothing to install.
stat_file 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 stat_file 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 stat_file. 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.
stat_file is provided by the Omni Fs MCP server (vaayne/omni-fs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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