save_chapter · Bun Novel Processor MCP: Risk & Policy

WHAT IT DOES

What save_chapter does on Bun Novel Processor MCP

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

WHY IT NEEDS A POLICY

Why save_chapter needs a policy

This tool creates and writes chapter files and their associated metadata to persistent storage. It modifies the local filesystem reversibly (files can be edited or deleted later), making it a Write operation.

From the tool's definition Tool name 'save_chapter' and description '保存切分后的章节内容到本地文件，并记录章节元信息' (Save segmented chapter content to local file and record chapter metadata) indicate creation/modification of files and metadata records.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_chapter Rate-limited

save_chapter 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": {
    "save_chapter": {
      "limits": [
        {
          "counter": "save_chapter_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 Bun Novel Processor MCP, so you can run agents against it safely.

FAQ

Questions about save_chapter

What does the save_chapter tool do? +

保存切分后的章节内容到本地文件，并记录章节元信息。. It is categorised as a Write tool in the Bun Novel Processor MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on save_chapter? +

Register the Bun Novel Processor MCP server in PolicyLayer and add a rule for save_chapter: 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 Bun Novel Processor MCP. Nothing to install.

What risk level is save_chapter? +

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

Can I rate-limit save_chapter? +

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

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

save_chapter is provided by the Bun Novel Processor MCP server (tietiezhi-1216/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.