update_variable_in_variable_set

Modify specific attributes of an existing variable within a variable set in Terraform Cloud. Update name, value, description, category, HCL status, or sensitivity without altering unspecified attributes.

Instructions

Update an existing variable in a variable set.

Modifies the configuration of an existing variable within a variable set. Only specified attributes will be updated; unspecified attributes remain unchanged.

API endpoint: PATCH /varsets/{varset_id}/relationships/vars/{var_id}

Args: varset_id: The ID of the variable set (format: "varset-xxxxxxxx") var_id: The ID of the variable (format: "var-xxxxxxxx")

params: Variable parameters to update (optional):
    - key: New variable name/key
    - value: New variable value
    - description: New description of the variable
    - category: New variable category ("terraform" or "env")
    - hcl: Whether the value is HCL code (terraform variables only)
    - sensitive: Whether the variable value is sensitive

Returns: The updated variable with all current settings and configuration

See: docs/tools/variables.md#update-variable-in-variable-set for reference documentation

Input Schema

Name	Required	Description	Default
`params`	No
`var_id`	Yes
`varset_id`	Yes

Input Schema (JSON Schema)

{
  "$defs": {
    "VariableCategory": {
      "description": "Variable category options for workspace variables.\n\nDefines the type of variable:\n- TERRAFORM: Terraform input variables available in configuration\n- ENV: Environment variables available during plan/apply operations\n\nReference: https://developer.hashicorp.com/terraform/cloud-docs/api-docs/workspace-variables\n\nSee:\n    docs/models/variables.md for reference",
      "enum": [
        "terraform",
        "env"
      ],
      "title": "VariableCategory",
      "type": "string"
    },
    "VariableSetVariableParams": {
      "description": "Parameters for variable set variable operations without routing fields.\n\nThis model provides all optional parameters for creating or updating variables\nwithin variable sets, separating configuration parameters from routing information\nlike variable set ID and variable ID.\n\nReference: https://developer.hashicorp.com/terraform/cloud-docs/api-docs/variable-sets\n\nSee:\n    docs/models/variables.md for reference",
      "properties": {
        "category": {
          "anyOf": [
            {
              "$ref": "#/$defs/VariableCategory"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Variable category (terraform or env)"
        },
        "description": {
          "anyOf": [
            {
              "maxLength": 512,
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Description of the variable",
          "title": "Description"
        },
        "hcl": {
          "anyOf": [
            {
              "type": "boolean"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Whether the value is HCL code (only valid for terraform variables)",
          "title": "Hcl"
        },
        "key": {
          "anyOf": [
            {
              "maxLength": 255,
              "minLength": 1,
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Variable name/key",
          "title": "Key"
        },
        "sensitive": {
          "anyOf": [
            {
              "type": "boolean"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Whether the variable value is sensitive",
          "title": "Sensitive"
        },
        "value": {
          "anyOf": [
            {
              "maxLength": 256000,
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Variable value",
          "title": "Value"
        }
      },
      "title": "VariableSetVariableParams",
      "type": "object"
    }
  },
  "properties": {
    "params": {
      "anyOf": [
        {
          "$ref": "#/$defs/VariableSetVariableParams"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Params"
    },
    "var_id": {
      "title": "Var Id",
      "type": "string"
    },
    "varset_id": {
      "title": "Varset Id",
      "type": "string"
    }
  },
  "required": [
    "varset_id",
    "var_id"
  ],
  "type": "object"
}

terraform-cloud-mcp