Read the full contents of a file.
AI agents call read_file to retrieve information from Cursor 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 enables code browsing and inspection, which is a core Read operation. No data is modified, deleted, or executed. The low severity reflects that reading files poses minimal risk unless the workspace contains highly sensitive secrets or credentials, but that is a data sensitivity issue rather than a tool capability issue.
From the tool's definition Tool name is 'read_file' and description states 'Read the full contents of a file.' The verb 'read' and absence of any modification, deletion, or execution language clearly indicate a retrieval operation.
Attacks that exploit this kind of access
Read the full contents of a file. It is categorised as a Read tool in the Cursor MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Cursor MCP Server MCP server in PolicyLayer and add a rule for read_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 Cursor MCP Server. Nothing to install.
read_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 read_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 read_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.
read_file is provided by the Cursor MCP Server MCP server (tariqnasheed/cursor_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.
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