Read the complete contents of a file from the file system as text.
AI agents call read_text_file to retrieve information from Filesystem MCP Server (HTTP Streaming) 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 creating, modifying, or deleting data. It is a straightforward read operation with minimal security risk unless the file system contains highly sensitive data, but the tool itself performs no destructive or dangerous actions. The sibling tools (edit_file, move_file, create_directory) are more severe; this one is purely informational.
From the tool's definition Tool name 'read_text_file' and description 'Read the complete contents of a file from the file system as text' indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Read the complete contents of a file from the file system as text. It is categorised as a Read tool in the Filesystem MCP Server (HTTP Streaming) MCP Server, which means it retrieves data without modifying state.
Register the Filesystem MCP Server (HTTP Streaming) MCP server in PolicyLayer and add a rule for read_text_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 Filesystem MCP Server (HTTP Streaming). Nothing to install.
read_text_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_text_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_text_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_text_file is provided by the Filesystem MCP Server (HTTP Streaming) MCP server (jeswin/mcpfs). 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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