insert_in_body · Ast Editor MCP: Risk & Policy

WHAT IT DOES

What insert_in_body does on Ast Editor

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

WHY IT NEEDS A POLICY

Why insert_in_body needs a policy

Insert operations on code bodies create or modify source code reversibly. This is Write-category activity (not Execute, since it modifies code syntax rather than running it; not Destructive, since insertions can be undone). Confidence is slightly reduced because the tool description is empty, but the server's stated purpose ('surgical tools for structural edits') and sibling tool names provide sufficient context.

From the tool's definition Tool named 'insert_in_body' with sibling tools like 'add_field', 'add_method', 'add_parameter', 'delete_in_body' on an AST code-editing server. The name and context indicate insertion/modification of code structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

insert_in_body Rate-limited

insert_in_body 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_in_body": {
      "limits": [
        {
          "counter": "insert_in_body_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 Ast Editor, so you can run agents against it safely.

FAQ

Questions about insert_in_body

What does the insert_in_body tool do? +

insert_in_body. It is categorised as a Write tool in the Ast Editor 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_in_body? +

Register the Ast Editor MCP server in PolicyLayer and add a rule for insert_in_body: 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 Ast Editor. Nothing to install.

What risk level is insert_in_body? +

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

Can I rate-limit insert_in_body? +

Yes. Add a rate_limit block to the insert_in_body 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_in_body completely? +

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

insert_in_body is provided by the Ast Editor MCP server (kambleakash0/ast-editor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.