memento_coercion · Memento MCP: Risk & Policy

WHAT IT DOES

What memento_coercion does on Memento

AI agents invoke memento_coercion 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_coercion needs a policy

The term 'Active Coercion' combined with an 'apply_preset' action implies this tool executes behavioral enforcement rules or constraints on the AI agent's operation. This goes beyond mere data reads or writes — it triggers external operational effects by enforcing coercion presets.

From the tool's definition 'Active Coercion management' and actions including 'apply_preset' — applying coercion rules triggers autonomous enforcement behavior in the AI agent

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memento_coercion Rate-limited

memento_coercion 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_coercion": {
      "limits": [
        {
          "counter": "memento_coercion_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_coercion

What does the memento_coercion tool do? +

Active Coercion management. Actions: list_presets, apply_preset,. 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_coercion? +

Register the Memento MCP server in PolicyLayer and add a rule for memento_coercion: 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_coercion? +

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

Can I rate-limit memento_coercion? +

Yes. Add a rate_limit block to the memento_coercion 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_coercion completely? +

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

memento_coercion 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.