mcp_file_replace_content · ShowDoc MCP Server MCP

WHAT IT DOES

What mcp_file_replace_content does on ShowDoc MCP Server

AI agents use mcp_file_replace_content to create or update resources in ShowDoc MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ShowDoc MCP Server environment.

WHY IT NEEDS A POLICY

Why mcp_file_replace_content needs a policy

The tool replaces file content, which is a reversible modification operation. It falls under Write rather than Destructive because the original content could theoretically be recovered (depending on implementation) and it modifies rather than irreversibly deletes.

From the tool's definition Tool name 'mcp_file_replace_content' and description '替换文件内容' (replace file content) indicate file modification capability. This is a write operation that modifies existing files.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_file_replace_content Rate-limited

mcp_file_replace_content stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mcp_file_replace_content": {
      "limits": [
        {
          "counter": "mcp_file_replace_content_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches ShowDoc MCP Server, so you can run agents against it safely.

FAQ

Questions about mcp_file_replace_content

What does the mcp_file_replace_content tool do? +

替换文件内容。. It is categorised as a Write tool in the ShowDoc MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mcp_file_replace_content? +

Register the ShowDoc MCP Server MCP server in PolicyLayer and add a rule for mcp_file_replace_content: 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 ShowDoc MCP Server. Nothing to install.

What risk level is mcp_file_replace_content? +

mcp_file_replace_content is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit mcp_file_replace_content? +

Yes. Add a rate_limit block to the mcp_file_replace_content 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 mcp_file_replace_content completely? +

Set action: deny in the PolicyLayer policy for mcp_file_replace_content. 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 mcp_file_replace_content? +

mcp_file_replace_content is provided by the ShowDoc MCP Server MCP server (yfcyfc123234/showdoc_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.