# suggest_change

Propose a change for a person to approve instead of making it. Use it when you aren't sure a fact is right, when the change is consequential (a deal's stage or amount), or when your access only allows suggesting. Give the operation you would call and its exact input, a one-sentence reason, and the evidence you saw. The input is validated now; nothing changes until someone approves.

| | |
| --- | --- |
| Group | Suggestions |
| Scope | `crm:suggest` (included in `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 |
| --- | --- | --- | --- |
| `operation` | `upsert_company` \\| `upsert_person` \\| `create_deal` \\| `update_deal` \\| `set_deal_contact` \\| `set_custom_fields` \\| `log_activity` \\| `record_signal` \\| `create_task` | yes |  |
| `input` | object | yes | Exactly what you would pass to that operation. |
| `reason` | string | yes | Why, in one or two sentences.. max 2000 characters |
| `evidence` | array of object { source, excerpt?, url? } | no | default [], max 10 items |
| `evidence[].source` | string | yes | Where you saw it, e.g. 'email from jo@acme.com, 3 Oct' or 'acme.com/about'.. max 200 characters |
| `evidence[].excerpt` | string | no | The words that support the change, quoted.. max 2000 characters |
| `evidence[].url` | URL | no |  |

## Call it over MCP

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "suggest_change",
    "arguments": {
      "operation": "upsert_company",
      "input": {},
      "reason": "…",
      "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/suggest_change \
  -H "Authorization: Bearer $TANDEM_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: log-call-acme-2026-11-02" \
  -d '{"operation":"upsert_company","input":{},"reason":"…"}'
```

## 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": {
    "operation": {
      "type": "string",
      "enum": [
        "upsert_company",
        "upsert_person",
        "create_deal",
        "update_deal",
        "set_deal_contact",
        "set_custom_fields",
        "log_activity",
        "record_signal",
        "create_task"
      ]
    },
    "input": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {},
      "description": "Exactly what you would pass to that operation."
    },
    "reason": {
      "type": "string",
      "minLength": 1,
      "maxLength": 2000,
      "description": "Why, in one or two sentences."
    },
    "evidence": {
      "default": [],
      "maxItems": 10,
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "source": {
            "type": "string",
            "minLength": 1,
            "maxLength": 200,
            "description": "Where you saw it, e.g. 'email from jo@acme.com, 3 Oct' or 'acme.com/about'."
          },
          "excerpt": {
            "description": "The words that support the change, quoted.",
            "type": "string",
            "maxLength": 2000
          },
          "url": {
            "type": "string",
            "format": "uri"
          }
        },
        "required": [
          "source"
        ]
      }
    }
  },
  "required": [
    "operation",
    "input",
    "reason"
  ]
}
```