read_workspace_file

Read a file from the agent workspace. Returns content for text files, metadata for media files.

SERVERNodebench SOURCEnodebench-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-homenshum-nodebench/read-workspace-file.md

WHAT IT DOES

What read_workspace_file does on Nodebench

AI agents call read_workspace_file to retrieve information from Nodebench without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why read_workspace_file is rated Low

This is a straightforward file read operation that retrieves data from the workspace without creating, modifying, deleting, or executing anything. It has minimal blast radius even if misused by an agent, as it only exposes existing workspace data. No side effects are mentioned or implied.

From the tool's definition Tool name explicitly starts with 'read_'; description states 'Read a file from the agent workspace' with retrieval of 'content for text files, metadata for media files' — purely informational operations with no modifications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs read_workspace_file safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Nodebench, 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 Allowed

read_workspace_file is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "read_workspace_file": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Nodebench, apply this rule, and every read_workspace_file call is checked against it from then on.

FAQ

Questions about read_workspace_file

What does the read_workspace_file tool do? +

Read a file from the agent workspace. Returns content for text files, metadata for media files. It is categorised as a Read tool in the Nodebench MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_workspace_file? +

Register the Nodebench 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 Nodebench. Nothing to install.

What risk level is read_workspace_file? +

read_workspace_file is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_workspace_file? +

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.

How do I block read_workspace_file completely? +

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.

What MCP server provides read_workspace_file? +

read_workspace_file is provided by the Nodebench MCP server (nodebench-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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