set_change_reason · Code Context MCP: Risk & Policy

WHAT IT DOES

What set_change_reason does on Code Context

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

WHY IT NEEDS A POLICY

Why set_change_reason needs a policy

An AI agent can call set_change_reason faster than any human can review — one bad instruction and it creates or modifies resources in Code Context by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_change_reason Rate-limited

set_change_reason 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": {
    "set_change_reason": {
      "limits": [
        {
          "counter": "set_change_reason_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 Code Context, so you can run agents against it safely.

FAQ

Questions about set_change_reason

What does the set_change_reason tool do? +

Set a reason/explanation for a recorded file change. It is categorised as a Write tool in the Code Context MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_change_reason? +

Register the Code Context MCP server in PolicyLayer and add a rule for set_change_reason: 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 Code Context. Nothing to install.

What risk level is set_change_reason? +

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

Can I rate-limit set_change_reason? +

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

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

set_change_reason is provided by the Code Context MCP server (velimirmueller/vlm-code-context-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.