memento_install_git_hooks · Memento MCP: Risk & Policy

WHAT IT DOES

What memento_install_git_hooks does on Memento

AI agents invoke memento_install_git_hooks to trigger actions in Memento. 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.

WHY IT NEEDS A POLICY

Why memento_install_git_hooks needs a policy

This tool installs git hooks into a repository, which modifies the repository's configuration and causes code to execute automatically on future git operations (pre-commit).

From the tool's definition 'Install or update deterministic git hooks (pre-commit) for Active Coercion in the current git repository'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memento_install_git_hooks Rate-limited

memento_install_git_hooks stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "memento_install_git_hooks": {
      "limits": [
        {
          "counter": "memento_install_git_hooks_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Memento, so you can run agents against it safely.

FAQ

Questions about memento_install_git_hooks

What does the memento_install_git_hooks tool do? +

[DEPRECATED] Install or update deterministic git hooks (pre-commit) for Active Coercion in the current git repository. It is categorised as a Execute tool in the Memento MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on memento_install_git_hooks? +

Register the Memento MCP server in PolicyLayer and add a rule for memento_install_git_hooks: 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 Memento. Nothing to install.

What risk level is memento_install_git_hooks? +

memento_install_git_hooks is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit memento_install_git_hooks? +

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

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

memento_install_git_hooks is provided by the Memento MCP server (joyciakira/memento). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.