insert | PolicyLayer

WHAT IT DOES

What insert does on TheWeave: Memory for AI agents you can cat, grep, and git

AI agents use insert to create or update resources in TheWeave: Memory for AI agents you can cat, grep, and git — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your TheWeave: Memory for AI agents you can cat, grep, and git environment.

WHY IT NEEDS A POLICY

Why insert needs a policy

This tool creates or modifies data reversibly by inserting text into markdown memory files. It does not execute code, destroy data, or move money. The modification is reversible via delete or str_replace operations. Medium severity reflects that malicious insertion could corrupt an agent's memory state, but effects are containable and undoable.

From the tool's definition Tool description states it 'Insert[s] content BEFORE the given 1-indexed line', which modifies file contents. The sibling tools are create, delete, str_replace, and view—a standard set for reversible file operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

insert Rate-limited

insert 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": {
    "insert": {
      "limits": [
        {
          "counter": "insert_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 TheWeave: Memory for AI agents you can cat, grep, and git, so you can run agents against it safely.

FAQ

Questions about insert

What does the insert tool do? +

Insert content BEFORE the given 1-indexed line (line=0 prepends). It is categorised as a Write tool in the TheWeave: Memory for AI agents you can cat, grep, and git MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on insert? +

Register the TheWeave: Memory for AI agents you can cat, grep, and git MCP server in PolicyLayer and add a rule for insert: 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 TheWeave: Memory for AI agents you can cat, grep, and git. Nothing to install.

What risk level is insert? +

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

Can I rate-limit insert? +

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

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

insert is provided by the TheWeave: Memory for AI agents you can cat, grep, and git MCP server (theweavesc/theweave). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.