spinnaker-mcp

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List firewalls

list_firewalls

Read-onlyIdempotent

Lists all firewall rules (security groups) across Spinnaker accounts and regions to audit network security posture or locate a security group before inspection.

Instructions

List all firewall rules (security groups) across all Spinnaker accounts and regions. Use this to audit network security posture or find a specific security group before inspecting it with get_firewall. Returns JSON array of firewall objects grouped by account and region.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "list_firewalls"
  }
}

Input Schema

Name	Required	Description	Default
No arguments

Output Schema

Name	Required	Description	Default
`count`	No	Number of records in items.
`items`	No	The records, when Gate answered with a list.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.4.1Nov 1, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "The Gate response. A JSON object from Gate comes back as is; a JSON array comes back as {items, count}.",
+  "properties": {
+    "count": {
+      "description": "Number of records in items.",
+      "minimum": 0,
+      "type": "integer"
+    },
+    "items": {
+      "description": "The records, when Gate answered with a list.",
+      "type": "array"
+    }
+  },
+  "type": "object"
+}

First observedv0.1.0Apr 23, 2026

TDQS

A4.6/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, non-destructive, and open-world behavior, so safety is covered. The description adds that results span all accounts and regions and come back grouped by account and region, which is meaningful behavioral context. It does not mention result size or pagination limits, which matters for an all-accounts enumeration.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three tight sentences: scope first, then when to use, then return shape. No filler and no restatement of the title.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Output schema exists, so return-value detail is mostly redundant, and the description still gives grouping behavior. The only gap is no warning about result volume or pagination when enumerating every account and region.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

There are zero parameters, so there is nothing to document; baseline applies. The description correctly implies the tool is unfiltered (it enumerates everything across accounts), which is the one semantic fact an agent needs.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('List all firewall rules (security groups)') plus explicit scope ('across all Spinnaker accounts and regions'). It also clarifies the domain vocabulary mapping (firewall = security group), which disambiguates from the singular get_firewall sibling.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Names concrete use cases ('audit network security posture or find a specific security group') and explicitly routes the agent to the alternative tool ('before inspecting it with get_firewall'), making the list-vs-get split unambiguous.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.