replace_section_tool · Alaya MCP: Risk & Policy

WHAT IT DOES

What replace_section_tool does on Alaya

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

WHY IT NEEDS A POLICY

Why replace_section_tool needs a policy

The tool performs a reversible modification operation (replacing a section's content), which is characteristic of Write category tools. It does not delete entire notes or sections (that would be Destructive), nor does it execute arbitrary code.

From the tool's definition Tool description states 'Replace the content of a named ## section in a note.' This modifies existing note content. The server description confirms 'full read, write, search, and synthesis operations on notes.'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

replace_section_tool Rate-limited

replace_section_tool 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": {
    "replace_section_tool": {
      "limits": [
        {
          "counter": "replace_section_tool_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 Alaya, so you can run agents against it safely.

FAQ

Questions about replace_section_tool

What does the replace_section_tool tool do? +

Replace the content of a named ## section in a note. It is categorised as a Write tool in the Alaya MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on replace_section_tool? +

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

What risk level is replace_section_tool? +

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

Can I rate-limit replace_section_tool? +

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

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

replace_section_tool is provided by the Alaya MCP server (luke-kucing/alaya). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.