# pyenv

Manages Python versions via pyenv.

Agent View of the PolicyLayer registry record for `pyenv`. HTML page: https://policylayer.com/tools/io-github-dave-london-git/pyenv

## Facts

- Tool: `pyenv`
- Server: Git (`Dave-London/Pare`) — https://policylayer.com/tools/io-github-dave-london-git.md
- Homepage: https://github.com/Dave-London/pare
- Risk category: Execute (High 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": "pyenv",
    "arguments": {}
  }
}
```

## Why pyenv is rated High

Managing Python versions via pyenv involves executing shell commands (e.g., pyenv install, pyenv global, pyenv local) that modify the system's Python runtime environment. This can affect all Python-dependent processes and tools on the system.

From the tool's own definition: "Manages Python versions via pyenv"

## Use case

AI agents invoke pyenv to trigger actions in Git. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "pyenv": {
      "limits": [
        {
          "counter": "pyenv_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Git (201)

- `branch` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/branch.md
- `clean` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/clean.md
- `package-clean` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/package-clean.md
- `remove` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/remove.md
- `reset` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/reset.md
- `secret-delete` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/secret-delete.md
- `stash` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/stash.md
- `tag` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/tag.md
- `variable-delete` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/variable-delete.md
- `workspace` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/workspace.md
- `worktree` — Destructive — https://policylayer.com/tools/io-github-dave-london-git/worktree.md
- `add-package` — Execute — https://policylayer.com/tools/io-github-dave-london-git/add-package.md
- `ansible-galaxy` — Execute — https://policylayer.com/tools/io-github-dave-london-git/ansible-galaxy.md
- `ansible-playbook` — Execute — https://policylayer.com/tools/io-github-dave-london-git/ansible-playbook.md
- `api` — Execute — https://policylayer.com/tools/io-github-dave-london-git/api.md
- `apply` — Execute — https://policylayer.com/tools/io-github-dave-london-git/apply.md
- `audit` — Execute — https://policylayer.com/tools/io-github-dave-london-git/audit.md
- `bazel` — Execute — https://policylayer.com/tools/io-github-dave-london-git/bazel.md
- `bisect` — Execute — https://policylayer.com/tools/io-github-dave-london-git/bisect.md
- `black` — Execute — https://policylayer.com/tools/io-github-dave-london-git/black.md
- `build` — Execute — https://policylayer.com/tools/io-github-dave-london-git/build.md
- `bundle-exec` — Execute — https://policylayer.com/tools/io-github-dave-london-git/bundle-exec.md
- `bundle-install` — Execute — https://policylayer.com/tools/io-github-dave-london-git/bundle-install.md
- `check` — Execute — https://policylayer.com/tools/io-github-dave-london-git/check.md
- `checkout` — Execute — https://policylayer.com/tools/io-github-dave-london-git/checkout.md
- `cherry-pick` — Execute — https://policylayer.com/tools/io-github-dave-london-git/cherry-pick.md
- `clippy` — Execute — https://policylayer.com/tools/io-github-dave-london-git/clippy.md
- `cmake` — Execute — https://policylayer.com/tools/io-github-dave-london-git/cmake.md
- `compose-build` — Execute — https://policylayer.com/tools/io-github-dave-london-git/compose-build.md
- `compose-down` — Execute — https://policylayer.com/tools/io-github-dave-london-git/compose-down.md
- …and 171 more: https://policylayer.com/tools/io-github-dave-london-git.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=io-github-dave-london-git · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-dave-london-git