stream · HoloViz MCP Server MCP: Risk & Policy

WHAT IT DOES

What stream does on HoloViz MCP Server

AI agents call stream as a supporting operation in HoloViz MCP Server workflows.

WHY IT NEEDS A POLICY

Why stream needs a policy

The description is empty and uninformative, making it impossible to accurately classify. 'Stream' could refer to streaming data (Read), streaming output (Execute), or something else entirely. In the context of a HoloViz visualization server, it likely streams data or updates to a visualization, which could be Read or Write, but confidence is very low. Defaulting to Other due to insufficient information.

From the tool's definition Tool name is 'stream' with empty description. No information about what the tool does beyond its name.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stream Rate-limited

stream gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "stream": {
      "limits": [
        {
          "counter": "stream_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about stream

What does the stream tool do? +

stream. It is categorised as a Other tool in the HoloViz MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on stream? +

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

What risk level is stream? +

stream is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit stream? +

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

Set action: deny in the PolicyLayer policy for 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 stream? +

stream is provided by the HoloViz MCP Server MCP server (sumayabee/holoviz-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.