Medium Risk

replaceRawLines

替换RawMemory中指定行范围的文本内容,支持模式匹配定位。

How to control replaceRawLines ↓

What replaceRawLines does on ThinkMem

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

Medium Risk

Why replaceRawLines needs a policy

This tool modifies existing data in RawMemory by replacing text within specified line ranges. It is a Write operation rather than Destructive because replacement is reversible—the previous content could theoretically be recovered if the system maintains history, and the tool does not permanently delete data.

From the tool's definition Tool description states '替换RawMemory中指定行范围的文本内容' which translates to 'replace text content of specified line ranges in RawMemory.' The operation modifies stored memory data reversibly through text replacement.

Documented attack patterns abuse exactly the kind of access replaceRawLines gives an agent:

How to control replaceRawLines

PolicyLayer is an MCP gateway — it sits between your AI agents and ThinkMem, and nothing reaches the server without passing your rules. This is the rule we recommend for replaceRawLines:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "replaceRawLines": {
      "limits": [
        {
          "counter": "replacerawlines_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

replaceRawLines 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.

  1. Create a free account and register ThinkMem — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
LIMIT THIS TOOL →

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Related tools and policies

Go deeper

Questions about replaceRawLines

What does the replaceRawLines tool do? +

替换RawMemory中指定行范围的文本内容,支持模式匹配定位。. It is categorised as a Write tool in the ThinkMem MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on replaceRawLines? +

Register the ThinkMem MCP server in PolicyLayer and add a rule for replaceRawLines: 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 ThinkMem. Nothing to install.

What risk level is replaceRawLines? +

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

Can I rate-limit replaceRawLines? +

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

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

replaceRawLines is provided by the ThinkMem MCP server (rickonono3/thinkmem). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ThinkMem tool call.

Start from ThinkMem, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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