Read the contents of a file from the local filesystem. Features: - Read entire file or a specific byte range - Automatic encoding detection (UTF-8 default) - Returns file metadata (size, last modified) - Supports any text file type Security: - Rejects paths outside the allowed root directories - ...
AI agents call file_read to retrieve information from MCP Toolkit Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data (file contents and metadata) without any side effects or modifications. It has built-in protections against path traversal attacks and refuses binary file reads. The impact of misuse is limited to information disclosure within allowed directories, making it a low-severity Read operation.
From the tool's definition Tool description explicitly states 'Read the contents of a file from the local filesystem' with features for reading file contents and metadata. Security restrictions prevent directory traversal and binary file access.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
Read the contents of a file from the local filesystem. Features: - Read entire file or a specific byte range - Automatic encoding detection (UTF-8 default) - Returns file metadata (size, last modified) - Supports any text file type Security: - Rejects paths outside the allowed root directories - Refuses to read binary files or directories. It is categorised as a Read tool in the MCP Toolkit Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Toolkit Server MCP server in PolicyLayer and add a rule for file_read: 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 MCP Toolkit Server. Nothing to install.
file_read 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 file_read 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 file_read. 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.
file_read is provided by the MCP Toolkit Server MCP server (vyshnavi-nandyala/mcp-toolkit-server). 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.
Teams ship this data inside their own products. See what a licence covers →