Read the contents of a file from the filesystem
AI agents call file_reader to retrieve information from Example MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves file contents without side effects. It performs a query/fetch operation typical of Read category. Severity is low because reading files has limited blast radius unless the system exposes highly sensitive files, but that would be a configuration issue rather than a tool design issue. High confidence due to explicit 'Read' language in the description.
From the tool's definition Tool name 'file_reader' and description 'Read the contents of a file from the filesystem' explicitly indicate a read-only operation with no data modification or deletion.
Attacks that exploit this kind of access
Read the contents of a file from the filesystem. It is categorised as a Read tool in the Example MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Example MCP Server MCP server in PolicyLayer and add a rule for file_reader: 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 Example MCP Server. Nothing to install.
file_reader 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_reader 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_reader. 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_reader is provided by the Example MCP Server MCP server (ranjith63812/mcp-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 →