Opsphere — DevOps & SRE Intelligence

Prometheus alerts

prom_alerts

Read-only

List pending and firing alerts evaluated by Prometheus (/api/v1/alerts).

Input Schema

Name	Required	Description	Default
`context_id`	No	Optional explicit Connection Hub work context (ctx_*). Omit to use the conversation's active workspace; global Hub tools ignore it.

Output Schema

Name	Required	Description	Default
`ok`	Yes
`data`	Yes
`contractVersion`	Yes
`dataSchemaVersion`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed26 schema fields changedOct 26, 2026

changedOutput schema / properties / data / additionalProperties
```
Previous value: -trueNew value: +false
```
removedOutput schema / properties / data / properties / count
```
Removed value: -{
-  "type": "number"
-}
```

removedOutput schema / properties / data / properties / data

Removed value: -{
-  "anyOf": [
-    {
-      "$ref": "#/properties/data/properties/items"
-    },
-    {
-      "$ref": "#/properties/data/properties/items/items"
-    }
-  ]
-}

removedOutput schema / properties / data / properties / error

Removed value: -{
-  "anyOf": [
-    {
-      "type": "string"
-    },
-    {
-      "$ref": "#/properties/data/properties/items/items"
-    }
-  ]
-}

addedOutput schema / properties / data / properties / family

Added value: +{
+  "const": "prometheus",
+  "type": "string"
+}

addedOutput schema / properties / data / properties / gaps

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

removedOutput schema / properties / data / properties / items

Removed value: -{
-  "items": {
-    "additionalProperties": true,
-    "properties": {},
-    "type": "object"
-  },
-  "type": "array"
-}

removedOutput schema / properties / data / properties / message
```
Removed value: -{
-  "type": "string"
-}
```

removedOutput schema / properties / data / properties / meta

Removed value: -{
-  "$ref": "#/properties/data/properties/items/items"
-}

removedOutput schema / properties / data / properties / nextCursor

Removed value: -{
-  "type": [
-    "string",
-    "null"
-  ]
-}

removedOutput schema / properties / data / properties / ok
```
Removed value: -{
-  "type": "boolean"
-}
```

addedOutput schema / properties / data / properties / operation

Added value: +{
+  "const": "prom_alerts",
+  "type": "string"
+}

removedOutput schema / properties / data / properties / pageInfo

Removed value: -{
-  "$ref": "#/properties/data/properties/items/items"
-}

addedOutput schema / properties / data / properties / partial
```
Added value: +{
+  "type": "boolean"
+}
```

addedOutput schema / properties / data / properties / records

Added value: +{
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "createdAt": {
+        "type": "string"
+      },
+      "environment": {
+        "type": "string"
+      },
+      "facts": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "name": {
+              "type": "string"
+            },
+            "value": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "boolean"
+                },
+                {
+                  "type": "null"
+                },
+                {
+                  "items": {
+                    "type": [
+                      "string",
+                      "number",
+                      "boolean",
+                      "null"
+                    ]
+                  },
+                  "type": "array"
+                }
+              ]
+            }
+          },
+          "required": [
+            "name",
+            "value"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "id": {
+        "type": "string"
+      },
+      "key": {
+        "type": "string"
+      },
+      "labels": {
+        "items": {
+          "$ref": "#/properties/data/properties/records/items/properties/facts/items"
+        },
+        "type": "array"
+      },
+      "message": {
+        "type": "string"
+      },
+      "metric": {
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      },
+      "severity": {
+        "type": "string"
+      },
+      "status": {
+        "type": "string"
+      },
+      "summary": {
+        "type": "string"
+      },
+      "tags": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "timestamp": {
+        "type": "string"
+      },
+      "title": {
+        "type": "string"
+      },
+      "type": {
+        "type": "string"
+      },
+      "unit": {
+        "type": "string"
+      },
+      "updatedAt": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      },
+      "value": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "facts",
+      "labels"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

removedOutput schema / properties / data / properties / results

Removed value: -{
-  "$ref": "#/properties/data/properties/items"
-}

removedOutput schema / properties / data / properties / status

Removed value: -{
-  "type": [
-    "string",
-    "number"
-  ]
-}

addedOutput schema / properties / data / properties / summary
```
Added value: +{
+  "type": "string"
+}
```
removedOutput schema / properties / data / properties / text
```
Removed value: -{
-  "type": "string"
-}
```
addedOutput schema / properties / data / properties / total / minimum
```
Added value: +0
```
changedOutput schema / properties / data / properties / total / type
```
Previous value: -"number"New value: +"integer"
```
addedOutput schema / properties / data / properties / truncated
```
Added value: +{
+  "type": "boolean"
+}
```

addedOutput schema / properties / data / properties / warnings

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / data / required

Added value: +[
+  "family",
+  "operation",
+  "records",
+  "total",
+  "partial",
+  "truncated",
+  "warnings",
+  "gaps"
+]

addedOutput schema / properties / dataSchemaVersion

Added value: +{
+  "const": 2,
+  "type": "number"
+}

changedOutput schema / required

Previous value: -[
-  "contractVersion",
-  "ok",
-  "data"
-]New value: +[
+  "contractVersion",
+  "dataSchemaVersion",
+  "ok",
+  "data"
+]

First observedOct 15, 2026

TDQS

B3.3/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds that both pending and firing alert states are included (a useful behavioral detail beyond annotations), but says nothing about auth requirements, pagination, or result size on the underlying Prometheus API.

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?

One sentence, front-loaded with the verb and resource, ending with the concrete API path. Nothing extraneous and nothing buried.

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

Completeness3/5

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

An output schema exists, so return-value explanation is not needed, and annotations cover safety. What is missing is sibling disambiguation (notably 'alerts_active') and any operational context such as scoping or expected alert volume for a 150+ tool catalog.

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

Parameters3/5

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

The single parameter is context_id, whose schema description already fully documents the optional work-context behavior (100% coverage). The tool description adds no parameter-level meaning, which is acceptable at this coverage level but earns only the baseline.

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 pending and firing alerts') and pins the source to Prometheus's /api/v1/alerts endpoint, so the agent knows exactly what data comes back. However, it never distinguishes itself from the sibling 'alerts_active', which by name appears to cover overlapping territory.

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

Usage Guidelines2/5

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

No statement of when to use this versus 'alerts_active', 'prom_query', or 'prom_query_range'. The description lists what it returns but gives no selection criteria or exclusions, leaving the agent to guess among several plausible alert/query siblings.

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

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