conduit_create_stream · Conduit MCP: Risk & Policy

WHAT IT DOES

What conduit_create_stream does on Conduit MCP

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

WHY IT NEEDS A POLICY

Why conduit_create_stream needs a policy

This tool creates a new resource (a data stream) which is a reversible write operation. It does not delete, execute arbitrary code, move money, or trigger uncontrolled external operations. The blast radius is moderate: an agent could create many streams or pollute the namespace, but streams can be deleted and are typically isolated.

From the tool's definition Tool description states 'Create a new data stream' — a direct creation action that modifies the system state by adding a new stream resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

conduit_create_stream Rate-limited

conduit_create_stream 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": {
    "conduit_create_stream": {
      "limits": [
        {
          "counter": "conduit_create_stream_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 Conduit MCP, so you can run agents against it safely.

FAQ

Questions about conduit_create_stream

What does the conduit_create_stream tool do? +

Create a new data stream. Just send a name — schema is auto-detected from the first event. It is categorised as a Write tool in the Conduit MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on conduit_create_stream? +

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

What risk level is conduit_create_stream? +

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

Can I rate-limit conduit_create_stream? +

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

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

conduit_create_stream is provided by the Conduit MCP server (useconduit/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.