read_workspace_file
读取工作区中某个文件的文本内容。 支持 UTF-8 编码的文本文件。二进制文件(图片、压缩包等)不支持。 大文件自动截断:最多读取前 512KB / 5000 行。 路径必须在已绑定的工作区范围内。
This record as markdown: /tools/deepractice-promptx/read-workspace-file.md
What read_workspace_file does on PromptX
AI agents call read_workspace_file to retrieve information from PromptX without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why read_workspace_file is rated Low
This tool retrieves data (file text contents) without any side effects, modification, or destructive operations. It is a pure read operation scoped to workspace files. The low severity reflects that unauthorized file reads typically have limited immediate blast radius compared to write, execute, or destructive operations, though actual risk depends on file contents.
From the tool's definition Tool name is 'read_workspace_file' and description states '读取工作区中某个文件的文本内容' (reads text content of a file in the workspace). The description explicitly mentions reading/retrieving file contents with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
The rule that runs read_workspace_file safely
PolicyLayer is an MCP gateway: it sits between your AI agents and PromptX, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For read_workspace_file, this is the rule to start with:
read_workspace_file is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect PromptX, apply this rule, and every read_workspace_file call is checked against it from then on.
Questions about read_workspace_file
读取工作区中某个文件的文本内容。 支持 UTF-8 编码的文本文件。二进制文件(图片、压缩包等)不支持。 大文件自动截断:最多读取前 512KB / 5000 行。 路径必须在已绑定的工作区范围内。. It is categorised as a Read tool in the PromptX MCP Server, which means it retrieves data without modifying state.
Register the PromptX MCP server in PolicyLayer and add a rule for read_workspace_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 PromptX. Nothing to install.
read_workspace_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_workspace_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_workspace_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_workspace_file is provided by the PromptX MCP server (deepractice/promptx). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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