edit_leading_comment · Ast Editor MCP: Risk & Policy

WHAT IT DOES

What edit_leading_comment does on Ast Editor

AI agents use edit_leading_comment 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 edit_leading_comment needs a policy

The tool appears to modify (edit) leading comments in code, which is a reversible change to source code structure. This falls under Write rather than Read (it modifies, not just retrieves) or Execute (it doesn't run code). While comments don't affect runtime behavior, modifying source code comments is a Write-category operation.

From the tool's definition Tool name 'edit_leading_comment' suggests modification of comments; server description indicates 'surgical tools for structural edits' that perform 'byte-correct edits'; sibling tools like 'add_field', 'add_method', 'add_import' are clearly Write operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

edit_leading_comment Rate-limited

edit_leading_comment 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": {
    "edit_leading_comment": {
      "limits": [
        {
          "counter": "edit_leading_comment_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 edit_leading_comment

What does the edit_leading_comment tool do? +

edit_leading_comment. 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 edit_leading_comment? +

Register the Ast Editor MCP server in PolicyLayer and add a rule for edit_leading_comment: 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 edit_leading_comment? +

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

Can I rate-limit edit_leading_comment? +

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

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

edit_leading_comment 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.