circuit_breaker_configure · Agent Runtime MCP: Risk & Policy

WHAT IT DOES

What circuit_breaker_configure does on Agent Runtime

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

WHY IT NEEDS A POLICY

Why circuit_breaker_configure needs a policy

Based on the tool name alone, 'configure' implies modifying the settings or state of a circuit breaker component. This is most likely a Write operation (updating configuration), though without a description confidence is low. It could potentially be Execute-level if configuring a circuit breaker triggers state changes in pipelines, but Write is the most conservative reasonable inference.

From the tool's definition Tool name: circuit_breaker_configure; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

circuit_breaker_configure Rate-limited

circuit_breaker_configure 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": {
    "circuit_breaker_configure": {
      "limits": [
        {
          "counter": "circuit_breaker_configure_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about circuit_breaker_configure

What does the circuit_breaker_configure tool do? +

circuit_breaker_configure. It is categorised as a Write tool in the Agent Runtime MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on circuit_breaker_configure? +

Register the Agent Runtime MCP server in PolicyLayer and add a rule for circuit_breaker_configure: 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 Agent Runtime. Nothing to install.

What risk level is circuit_breaker_configure? +

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

Can I rate-limit circuit_breaker_configure? +

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

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

circuit_breaker_configure is provided by the Agent Runtime MCP server (marc-shade/agent-runtime-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.