complex_find_replace · Edit- MCP: Risk & Policy

WHAT IT DOES

What complex_find_replace does on Edit-MCP

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

WHY IT NEEDS A POLICY

Why complex_find_replace needs a policy

Find and replace modifies file content, which is a Write operation. The 'advanced' and 'context awareness' qualifiers suggest it may affect multiple files or perform complex substitutions, raising the blast radius. However, without explicit mention of irreversibility or deletion, it does not reach Destructive.

From the tool's definition 'find and replace operations' - modifies file content by replacing matched text

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

complex_find_replace Rate-limited

complex_find_replace 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": {
    "complex_find_replace": {
      "limits": [
        {
          "counter": "complex_find_replace_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 Edit-MCP, so you can run agents against it safely.

FAQ

Questions about complex_find_replace

What does the complex_find_replace tool do? +

Perform advanced find and replace operations with context awareness. It is categorised as a Write tool in the Edit-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on complex_find_replace? +

Register the Edit- MCP server in PolicyLayer and add a rule for complex_find_replace: 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 Edit-MCP. Nothing to install.

What risk level is complex_find_replace? +

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

Can I rate-limit complex_find_replace? +

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

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

complex_find_replace is provided by the Edit- MCP server (mixelpixx/microsoft-edit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.