MCP Server for Apache Airflow

unpause_dag

Resume a paused Apache Airflow DAG to restart its scheduled tasks and workflows using the DAG ID.

Instructions

Unpause a DAG by ID

Input Schema

TableJSON Schema

Name	Required	Description	Default
`dag_id`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedv1.0.0Jan 2, 2026

removedInput schema / properties / dag_id / title
```
Removed value: -"Dag Id"
```
removedInput schema / title
```
Removed value: -"unpause_dagArguments"
```

changedOutput schema / (root)

Previous value: -{
-  "$defs": {
-    "Annotations": {
-      "additionalProperties": true,
-      "properties": {
-        "audience": {
-          "anyOf": [
-            {
-              "items": {
-                "enum": [
-                  "user",
-                  "assistant"
-                ],
-                "type": "string"
-              },
-              "type": "array"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Audience"
-        },
-        "priority": {
-          "anyOf": [
-            {
-              "maximum": 1,
-              "minimum": 0,
-              "type": "number"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Priority"
-        }
-      },
-      "title": "Annotations",
-      "type": "object"
-    },
-    "BlobResourceContents": {
-      "additionalProperties": true,
-      "description": "Binary contents of a resource.",
-      "properties": {
-        "_meta": {
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-            {
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-          "default": null,
-          "title": "Meta"
-        },
-        "blob": {
-          "title": "Blob",
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-        "mimeType": {
-          "anyOf": [
-            {
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-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Mimetype"
-        },
-        "uri": {
-          "format": "uri",
-          "minLength": 1,
-          "title": "Uri",
-          "type": "string"
-        }
-      },
-      "required": [
-        "uri",
-        "blob"
-      ],
-      "title": "BlobResourceContents",
-      "type": "object"
-    },
-    "EmbeddedResource": {
-      "additionalProperties": true,
-      "description": "The contents of a resource, embedded into a prompt or tool call result.\n\nIt is up to the client how best to render embedded resources for the benefit\nof the LLM and/or the user.",
-      "properties": {
-        "_meta": {
-          "anyOf": [
-            {
-              "additionalProperties": true,
-              "type": "object"
-            },
-            {
-              "type": "null"
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-          ],
-          "default": null,
-          "title": "Meta"
-        },
-        "annotations": {
-          "anyOf": [
-            {
-              "$ref": "#/$defs/Annotations"
-            },
-            {
-              "type": "null"
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-          "default": null
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-        "resource": {
-          "anyOf": [
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-              "$ref": "#/$defs/TextResourceContents"
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-            {
-              "$ref": "#/$defs/BlobResourceContents"
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-          "title": "Resource"
-        },
-        "type": {
-          "const": "resource",
-          "title": "Type",
-          "type": "string"
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-      "required": [
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-      "title": "EmbeddedResource",
-      "type": "object"
-    },
-    "ImageContent": {
-      "additionalProperties": true,
-      "description": "Image content for a message.",
-      "properties": {
-        "_meta": {
-          "anyOf": [
-            {
-              "additionalProperties": true,
-              "type": "object"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Meta"
-        },
-        "annotations": {
-          "anyOf": [
-            {
-              "$ref": "#/$defs/Annotations"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null
-        },
-        "data": {
-          "title": "Data",
-          "type": "string"
-        },
-        "mimeType": {
-          "title": "Mimetype",
-          "type": "string"
-        },
-        "type": {
-          "const": "image",
-          "title": "Type",
-          "type": "string"
-        }
-      },
-      "required": [
-        "type",
-        "data",
-        "mimeType"
-      ],
-      "title": "ImageContent",
-      "type": "object"
-    },
-    "TextContent": {
-      "additionalProperties": true,
-      "description": "Text content for a message.",
-      "properties": {
-        "_meta": {
-          "anyOf": [
-            {
-              "additionalProperties": true,
-              "type": "object"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Meta"
-        },
-        "annotations": {
-          "anyOf": [
-            {
-              "$ref": "#/$defs/Annotations"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null
-        },
-        "text": {
-          "title": "Text",
-          "type": "string"
-        },
-        "type": {
-          "const": "text",
-          "title": "Type",
-          "type": "string"
-        }
-      },
-      "required": [
-        "type",
-        "text"
-      ],
-      "title": "TextContent",
-      "type": "object"
-    },
-    "TextResourceContents": {
-      "additionalProperties": true,
-      "description": "Text contents of a resource.",
-      "properties": {
-        "_meta": {
-          "anyOf": [
-            {
-              "additionalProperties": true,
-              "type": "object"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Meta"
-        },
-        "mimeType": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "default": null,
-          "title": "Mimetype"
-        },
-        "text": {
-          "title": "Text",
-          "type": "string"
-        },
-        "uri": {
-          "format": "uri",
-          "minLength": 1,
-          "title": "Uri",
-          "type": "string"
-        }
-      },
-      "required": [
-        "uri",
-        "text"
-      ],
-      "title": "TextResourceContents",
-      "type": "object"
-    }
-  },
-  "properties": {
-    "result": {
-      "items": {
-        "anyOf": [
-          {
-            "$ref": "#/$defs/TextContent"
-          },
-          {
-            "$ref": "#/$defs/ImageContent"
-          },
-          {
-            "$ref": "#/$defs/EmbeddedResource"
-          }
-        ]
-      },
-      "title": "Result",
-      "type": "array"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "unpause_dagOutput",
-  "type": "object"
-}New value: +null

First observedAug 18, 2025

TDQS

C2.9/5.0

Behavior2/5

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

With no annotations, the description carries full burden but only states the action without behavioral details. It doesn't mention permissions required, whether it's idempotent, what happens if the DAG isn't paused, or the response format. For a mutation tool with zero annotation coverage, this is inadequate.

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?

The description is a single, efficient sentence with zero wasted words. It's front-loaded with the core action and resource, making it easy to parse quickly.

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

Completeness2/5

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

For a mutation tool with no annotations, no output schema, and 0% schema coverage, the description is incomplete. It lacks behavioral context, parameter details, usage guidance, and expected outcomes, leaving significant gaps for an AI agent to operate effectively.

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?

Schema description coverage is 0%, but the description adds minimal context by specifying 'by ID' for the single parameter 'dag_id'. However, it doesn't explain what a DAG ID is, its format, or where to find it. With one parameter and low coverage, this provides basic but insufficient compensation.

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?

The description clearly states the verb ('Unpause') and resource ('a DAG by ID'), making the purpose immediately understandable. It doesn't differentiate from its sibling 'pause_dag' beyond the opposite action, but the purpose is unambiguous. A 5 would require explicit distinction from siblings.

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 guidance is provided on when to use this tool versus alternatives like 'patch_dag' or 'update_dag_run_state', nor prerequisites such as whether the DAG must be paused first. The description only states what it does, not when it's appropriate.

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

Deploy Server

unpause_dag

Instructions

Input Schema

Schema Changelog

TDQS

Other Tools