pipeline_matrix

Generate a multi-environment test matrix pipeline with proper promotion gates (Pro feature)

SERVERPlugin Hub SOURCE@barnburner121/plugin-hub-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/barnburner121-plugin-hub-mcp/pipeline-matrix.md

WHAT IT DOES

What pipeline_matrix does on Plugin Hub

AI agents call pipeline_matrix to retrieve information from Plugin Hub without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why pipeline_matrix is rated Low

Even though pipeline_matrix only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pipeline_matrix safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Plugin Hub, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pipeline_matrix, this is the rule to start with:

pipeline_matrix Allowed

pipeline_matrix is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pipeline_matrix": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Plugin Hub, apply this rule, and every pipeline_matrix call is checked against it from then on.

FAQ

Questions about pipeline_matrix

What does the pipeline_matrix tool do? +

Generate a multi-environment test matrix pipeline with proper promotion gates (Pro feature). It is categorised as a Read tool in the Plugin Hub MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on pipeline_matrix? +

Register the Plugin Hub MCP server in PolicyLayer and add a rule for pipeline_matrix: 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 Plugin Hub. Nothing to install.

What risk level is pipeline_matrix? +

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

Can I rate-limit pipeline_matrix? +

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

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

pipeline_matrix is provided by the Plugin Hub MCP server (@barnburner121/plugin-hub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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