Read file contents from the workspace. Returns file content as UTF-8 text along with metadata including path, size, and last modified timestamp.
AI agents call read_file to retrieve information from MCP Workspace Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that retrieves file data without modifying, executing, or deleting anything. The blast radius is minimal—an agent can only exfiltrate data within the workspace boundary. It matches the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch)'.
From the tool's definition Tool name 'read_file' and description 'Read file contents from the workspace. Returns file content as UTF-8 text along with metadata' clearly indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Read file contents from the workspace. Returns file content as UTF-8 text along with metadata including path, size, and last modified timestamp. It is categorised as a Read tool in the MCP Workspace Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Workspace 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 MCP Workspace 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 MCP Workspace Server MCP server (shayyeffet/ultimate_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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