UniFi Protect MCP

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List sirens

protect_list_sirens

Read-only

List all sirens managed by UniFi Protect with status, volume, LED, and connection details. Use limit and offset to page results on large sites.

Instructions

List all sirens managed by UniFi Protect. Returns array; each siren includes: id, modelKey, name, mac, state, type, guid, volume, ledSettings (isEnabled), sirenStatus (isActive, activatedAt, duration), connectionType, wirelessConnectionState (signalState: signalQuality, signalStrength; batteryStatus: percentage, isLow; bridge) (7.3.70 docs). On a large site, use limit and offset to page; a paged result also returns totalCount and offset.

Input Schema

Name	Required	Description	Default
`limit`	No	Return at most this many items
`offset`	No	Skip this many items first (default 0)

Output Schema

Name	Required	Description
`offset`	No	Paged results only: the index of the first item returned
`result`	Yes	Array of items returned by the list endpoint
`totalCount`	No	Paged results only: the number of items in the whole list

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedv2.15.0Oct 14, 2026

addedInput schema / $schema

Added value: +"http://json-schema.org/draft-07/schema#"

addedInput schema / properties / limit

Added value: +{
+  "description": "Return at most this many items",
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / offset

Added value: +{
+  "description": "Skip this many items first (default 0)",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

changedOutput schema / additionalProperties
```
Previous value: -falseNew value: +{}
```

addedOutput schema / properties / offset

Added value: +{
+  "description": "Paged results only: the index of the first item returned",
+  "maximum": 9007199254740991,
+  "minimum": -9007199254740991,
+  "type": "integer"
+}

changedOutput schema / properties / result / items / properties / wirelessConnectionState / description

Previous value: -"Wireless link state (object)"New value: +"Wireless link state (object: signalState { signalQuality, signalStrength }, batteryStatus { percentage, isLow }, bridge)"

addedOutput schema / properties / totalCount

Added value: +{
+  "description": "Paged results only: the number of items in the whole list",
+  "maximum": 9007199254740991,
+  "minimum": -9007199254740991,
+  "type": "integer"
+}

Changed2 schema fields changedv2.13.0Sep 20, 2026

addedOutput schema / properties / result / items / properties / guid

Added value: +{
+  "description": "Hardware MODEL GUID, shared by every unit of the same model. NOT a per-device identifier — use `id` to identify a device.",
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / result / items / properties / type

Added value: +{
+  "description": "Hardware model name, e.g. \"UVC G6 Turret\", \"UP Chime PoE\", \"UNVR-PRO\"",
+  "type": [
+    "string",
+    "null"
+  ]
+}

Changed10 schema fields changedv2.11.5Sep 13, 2026
- removedOutput schema / properties / result / items / properties / connectionType / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
- addedOutput schema / properties / result / items / properties / connectionType / type
```
Added value: +[
+  "string",
+  "null"
+]
```
- removedOutput schema / properties / result / items / properties / mac / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
- addedOutput schema / properties / result / items / properties / mac / type
```
Added value: +[
+  "string",
+  "null"
+]
```
- removedOutput schema / properties / result / items / properties / modelKey / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
- addedOutput schema / properties / result / items / properties / modelKey / type
```
Added value: +[
+  "string",
+  "null"
+]
```
- removedOutput schema / properties / result / items / properties / name / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
- addedOutput schema / properties / result / items / properties / name / type
```
Added value: +[
+  "string",
+  "null"
+]
```
- removedOutput schema / properties / result / items / properties / state / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
- addedOutput schema / properties / result / items / properties / state / type
```
Added value: +[
+  "string",
+  "null"
+]
```

Changed5 schema fields changedv2.7.5Jun 21, 2026

addedOutput schema / properties / result / items / properties / connectionType

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Connection type, e.g. \"lora\""
+}

addedOutput schema / properties / result / items / properties / ledSettings
```
Added value: +{
+  "description": "LED settings (object: isEnabled)"
+}
```

addedOutput schema / properties / result / items / properties / sirenStatus

Added value: +{
+  "description": "Current siren status (object: isActive, activatedAt, duration)"
+}

addedOutput schema / properties / result / items / properties / volume
```
Added value: +{
+  "description": "Siren volume (number)"
+}
```
addedOutput schema / properties / result / items / properties / wirelessConnectionState
```
Added value: +{
+  "description": "Wireless link state (object)"
+}
```

First observedv2.7.4Jun 11, 2026

TDQS

A3.5/5.0

Behavior3/5

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

The annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety and side-effect behavior are covered. The description adds pagination behavior (totalCount/offset in paged results), which is genuinely useful, but repeats the return-field inventory that the output schema already provides instead of disclosing anything richer (e.g. whether an empty site returns []).

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

Conciseness3/5

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

The purpose and paging advice are front-loaded and tight, but the long field-by-field inventory (id, modelKey, name, mac, state ... nested wirelessConnectionState sub-fields) is verbose and largely redundant with the output schema, adding bulk without adding selection value.

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?

The tool's real complexity is pagination, and that is fully addressed; the presence of an output schema means return values need not be enumerated. The only gap is the absence of sibling routing guidance, which the agent would otherwise have to infer.

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?

Schema description coverage is 100%, so the baseline would be 3, but the description goes further by explaining the behavioral consequence of the two parameters — that a paged result adds totalCount and offset to the response. That is meaning beyond the schema's 'return at most this many items' and 'skip this many items'.

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

Purpose4/5

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

States a specific verb and resource ('List all sirens managed by UniFi Protect'), which cleanly separates it from protect_get_siren. It does not explicitly contrast with siblings or the other protect_list_* tools, so it falls just short of a 5.

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

Usage Guidelines3/5

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

Gives one concrete usage condition — 'On a large site, use limit and offset to page' — which is real guidance, but it never states when to prefer this over protect_get_siren or the other list tools. Usage is implied rather than spelled out.

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