# update_task

Change only supplied task fields. Null clears due, assignee or record. Use complete_task to mark done.

| | |
| --- | --- |
| Group | Activity and tasks |
| Scope | `crm:write` |
| Who can call it | Agents and people with this scope. |
| Kind | Write. Recorded in the change history with who made it. |
| Retries | Pass `idempotency_key` (MCP) or the `Idempotency-Key` header (REST); a retry with the same key within 24 hours returns the first result. |
| Widget | In hosts that support MCP Apps, the result shows where the write landed (the changed record, the pipeline, or the updated list). |

## Parameters

| Parameter | Type | Required | Notes |
| --- | --- | --- | --- |
| `title` | string | no | max 200 characters |
| `notes` | string or null | no | max 4000 characters |
| `due` | date (YYYY-MM-DD) or date-time (ISO 8601 with offset) or null | no |  |
| `record` | object { type, id } or null | no |  |
| `record.type` | `company` \\| `person` \\| `deal` | yes |  |
| `record.id` | id (uuid) | yes |  |
| `assignee_user_id` | string or null | no |  |
| `reason` | string or null | no | max 500 characters |
| `signal_id` | id (uuid) or null | no |  |
| `id` | id (uuid) | yes |  |
| `status` | `open` \\| `cancelled` | no |  |

## Call it over MCP

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "update_task",
    "arguments": {
      "id": "00000000-0000-4000-8000-000000000000",
      "idempotency_key": "log-call-acme-2026-11-02"
    }
  }
}
```

Send it to `https://api.tandemcrm.app/mcp` (streamable HTTP). Most people never write this by hand: their agent picks the tool from its description.

## Call it over REST

```bash
curl -X POST https://api.tandemcrm.app/v1/ops/update_task \
  -H "Authorization: Bearer $TANDEM_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: log-call-acme-2026-11-02" \
  -d '{"id":"00000000-0000-4000-8000-000000000000"}'
```

## Input schema

The JSON Schema the MCP server advertises for this tool (over MCP it also accepts `idempotency_key`):

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "title": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200
    },
    "notes": {
      "anyOf": [
        {
          "type": "string",
          "maxLength": 4000
        },
        {
          "type": "null"
        }
      ]
    },
    "due": {
      "anyOf": [
        {
          "anyOf": [
            {
              "type": "string",
              "format": "date",
              "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))$"
            },
            {
              "type": "string",
              "format": "date-time",
              "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$"
            }
          ]
        },
        {
          "type": "null"
        }
      ]
    },
    "record": {
      "anyOf": [
        {
          "type": "object",
          "properties": {
            "type": {
              "type": "string",
              "enum": [
                "company",
                "person",
                "deal"
              ]
            },
            "id": {
              "type": "string",
              "format": "uuid",
              "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
            }
          },
          "required": [
            "type",
            "id"
          ]
        },
        {
          "type": "null"
        }
      ]
    },
    "assignee_user_id": {
      "anyOf": [
        {
          "type": "string",
          "minLength": 1
        },
        {
          "type": "null"
        }
      ]
    },
    "reason": {
      "anyOf": [
        {
          "type": "string",
          "maxLength": 500
        },
        {
          "type": "null"
        }
      ]
    },
    "signal_id": {
      "anyOf": [
        {
          "type": "string",
          "format": "uuid",
          "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
        },
        {
          "type": "null"
        }
      ]
    },
    "id": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    },
    "status": {
      "type": "string",
      "enum": [
        "open",
        "cancelled"
      ]
    }
  },
  "required": [
    "id"
  ]
}
```