# create_patch

Create a patch file from differences between files or directories

Agent View of the PolicyLayer registry record for `create_patch`. HTML page: https://policylayer.com/tools/agentics-ai-code-mcp/create-patch

## Facts

- Tool: `create_patch`
- Server: Code MCP Server (`agentics-ai/code-mcp`) — https://policylayer.com/tools/agentics-ai-code-mcp.md
- Homepage: https://github.com/agentics-ai/code-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "create_patch",
    "arguments": {}
  }
}
```

## Why create_patch is rated Medium

This tool creates new patch files, which are reversible modifications to code. While patches themselves are non-destructive artifacts, they enable code changes. The severity is medium because misuse could result in creating patches that introduce bugs or security issues when applied elsewhere, but the tool itself only creates metadata files rather than directly modifying source.

From the tool's own definition: "Tool creates patch files from file/directory differences. Patches are text representations of changes that can be applied to modify source code. The description states 'Create a patch file' which is a write/create operation."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Code MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_patch": {
      "limits": [
        {
          "counter": "create_patch_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Code MCP Server (72)

- `delete_file` — Destructive — https://policylayer.com/tools/agentics-ai-code-mcp/delete-file.md
- `docker_cleanup` — Destructive — https://policylayer.com/tools/agentics-ai-code-mcp/docker-cleanup.md
- `docker_containers` — Destructive — https://policylayer.com/tools/agentics-ai-code-mcp/docker-containers.md
- `remove_allowed_command` — Destructive — https://policylayer.com/tools/agentics-ai-code-mcp/remove-allowed-command.md
- `rollback_session` — Destructive — https://policylayer.com/tools/agentics-ai-code-mcp/rollback-session.md
- `docker_build` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-build.md
- `docker_compose` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-compose.md
- `docker_images` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-images.md
- `docker_networks` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-networks.md
- `docker_run` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-run.md
- `docker_system` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-system.md
- `docker_volumes` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/docker-volumes.md
- `git_push` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/git-push.md
- `install_dependencies` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/install-dependencies.md
- `npm_command` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/npm-command.md
- `pip_install` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/pip-install.md
- `run_command` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/run-command.md
- `run_custom_tool` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/run-custom-tool.md
- `run_javascript` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/run-javascript.md
- `run_python` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/run-python.md
- `run_tests` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/run-tests.md
- `secure_run_command` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/secure-run-command.md
- `secure_run_command_sequence` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/secure-run-command-sequence.md
- `start_coding_session` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/start-coding-session.md
- `start_server` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/start-server.md
- `stop_server` — Execute — https://policylayer.com/tools/agentics-ai-code-mcp/stop-server.md
- `end_coding_session` — Other — https://policylayer.com/tools/agentics-ai-code-mcp/end-coding-session.md
- `analyze_code` — Read — https://policylayer.com/tools/agentics-ai-code-mcp/analyze-code.md
- `analyze_file_differences` — Read — https://policylayer.com/tools/agentics-ai-code-mcp/analyze-file-differences.md
- `compare_commits` — Read — https://policylayer.com/tools/agentics-ai-code-mcp/compare-commits.md
- …and 42 more: https://policylayer.com/tools/agentics-ai-code-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=agentics-ai-code-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/agentics-ai-code-mcp