toggle_rule · Sablier MCP Server MCP: Risk & Policy

WHAT IT DOES

What toggle_rule does on Sablier MCP Server

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

WHY IT NEEDS A POLICY

Why toggle_rule needs a policy

This tool modifies the state of a trading rule (active/inactive). It is reversible — rules can be toggled back — so it falls under Write rather than Destructive. However, misuse could indirectly affect trading behavior by enabling or disabling rules used in forward testing, giving it medium severity.

From the tool's definition Activate or deactivate a systematic trading rule. Only active rules are included in forward_test_rules by default.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

toggle_rule Rate-limited

toggle_rule 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about toggle_rule

What does the toggle_rule tool do? +

Activate or deactivate a systematic trading rule. Only active rules are included in forward_test_rules by default. It is categorised as a Write tool in the Sablier 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 toggle_rule? +

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

What risk level is toggle_rule? +

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

Can I rate-limit toggle_rule? +

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

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

toggle_rule is provided by the Sablier MCP Server MCP server (sablier-ai/sablier-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.