end_codegen_session

THE RISK

Medium Risk

Why end_codegen_session needs a policy

This tool ends a session and generates (creates) a test file, which is a Write operation — it produces a new file artifact. It doesn't execute code, delete data irreversibly, or move money. The severity is medium because it writes files to the filesystem, which could overwrite existing test files if misused.

From the tool's definition End a code generation session and generate the test file

Documented attack patterns abuse exactly the kind of access end_codegen_session gives an agent:

POLICY

How to control end_codegen_session

PolicyLayer is an MCP gateway — it sits between your AI agents and RunAutomation MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for end_codegen_session:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "end_codegen_session": {
      "limits": [
        {
          "counter": "end_codegen_session_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

end_codegen_session 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.

Create a free account and register RunAutomation MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

More RunAutomation MCP Server tools

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All 91 RunAutomation MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about end_codegen_session

What does the end_codegen_session tool do? +

End a code generation session and generate the test file. It is categorised as a Write tool in the RunAutomation MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on end_codegen_session? +

Register the RunAutomation MCP Server MCP server in PolicyLayer and add a rule for end_codegen_session: 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 RunAutomation MCP Server. Nothing to install.

What risk level is end_codegen_session? +

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

Can I rate-limit end_codegen_session? +

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

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

end_codegen_session is provided by the RunAutomation MCP Server MCP server (tayyabakmal1/runautomation-mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every RunAutomation MCP Server tool call.

Start from RunAutomation MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →