Forkmate

update_meal

DestructiveIdempotent

Correct a food already in the user's diary — its name, quantity, macros, caffeine or fluid — or change an entry's meal label or note. The entry is identified by id and local_date, and a food by its item_index. Only the fields sent change; macros are merged onto the existing values and overwritten in place, with no history kept. A new quantity sent without macros rescales the food's macros, caffeine and fluid by the new amount ÷ the old one when both are the same kind of amount (a weight, a volume or a count), so '150 g' to '300 g' doubles them; otherwise the macros stay as they were and the reply says so. An entry cannot be moved to another day. All calorie and macro values, including carbohydrates, are estimates from USDA FoodData Central, Open Food Facts, the user's own entry or an AI assistant's estimate — approximate, not lab-measured or specific to a package or batch, and not suitable for insulin dosing (including carb counting for a meal bolus), blood-glucose prediction or any other medical decision.

Input Schema

TableJSON Schema

Name	Required	Description
`id`	Yes	The entry id, shown with each entry in the reply text when a meal is logged or a day or range is read.
`meal`	No	Move the entry to a different meal label.
`name`	No	Corrected name of the food.
`note`	No	Replacement note for the entry.
`said`	No	Optional. The user's own words describing this meal, verbatim (e.g. 'a pint of IPA and wings at the bar'). Only the meal description — not other parts of the conversation.
`macros`	No	Corrected macros. Only the components included are changed.
`fluid_ml`	No	Corrected fluid/hydration volume, in millilitres.
`quantity`	No	Portion as stated, e.g. '2' or '1 cup'.
`item_index`	No	Which food in the entry's items[] to edit (0-based). Required when changing a food's name/quantity/macros/caffeine/fluid; omit for an entry-level change (meal/note).
`local_date`	Yes	YYYY-MM-DD diary date of the entry.
`caffeine_mg`	No	Corrected caffeine content, in milligrams.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`entry`	Yes	One diary entry: a meal with its foods.
`day_totals`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 10, 2026

addedInput schema / properties / said

Added value: +{
+  "description": "Optional. The user's own words describing this meal, verbatim (e.g. 'a pint of IPA and wings at the bar'). Only the meal description — not other parts of the conversation.",
+  "maxLength": 300,
+  "type": "string"
+}

Changed4 schema fields changedOct 1, 2026

removedOutput schema / properties / entry / properties / created_at
```
Removed value: -{
-  "type": "string"
-}
```
addedOutput schema / properties / entry / properties / id / description
```
Added value: +"Identifies the entry for a later edit or deletion."
```

removedOutput schema / properties / entry / properties / items / items / properties / source

Removed value: -{
-  "description": "Where the macros came from (e.g. usda, off, client).",
-  "type": "string"
-}

addedOutput schema / properties / entry / properties / items / items / properties / unknown_macros

Added value: +{
+  "description": "Macros missing from the source data: shown as 0 but unknown, not a real zero.",
+  "items": {
+    "enum": [
+      "protein_g",
+      "carb_g",
+      "fat_g"
+    ],
+    "type": "string"
+  },
+  "type": "array"
+}

Changed1 schema field changedOct 1, 2026

changedInput schema / properties / id / description

Previous value: -"The entry id, as returned when reading a day."New value: +"The entry id, shown with each entry in the reply text when a meal is logged or a day or range is read."

Changed1 schema field changedSep 30, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "day_totals": {
+      "properties": {
+        "caffeine_mg": {
+          "type": "number"
+        },
+        "entry_count": {
+          "type": "integer"
+        },
+        "fluid_ml": {
+          "type": "number"
+        },
+        "local_date": {
+          "description": "A local date, YYYY-MM-DD.",
+          "type": "string"
+        },
+        "totals": {
+          "description": "Calories and macros. Estimates, not lab-measured; not for insulin dosing.",
+          "properties": {
+            "carb_g": {
+              "type": "number"
+            },
+            "fat_g": {
+              "type": "number"
+            },
+            "kcal": {
+              "type": "number"
+            },
+            "protein_g": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "kcal",
+            "protein_g",
+            "carb_g",
+            "fat_g"
+          ],
+          "type": "object"
+        }
+      },
+      "required": [
+        "local_date",
+        "entry_count",
+        "totals"
+      ],
+      "type": "object"
+    },
+    "entry": {
+      "description": "One diary entry: a meal with its foods.",
+      "properties": {
+        "at": {
+          "description": "ISO-8601 UTC instant the food was eaten.",
+          "type": "string"
+        },
+        "created_at": {
+          "type": "string"
+        },
+        "id": {
+          "type": "string"
+        },
+        "items": {
+          "items": {
+            "properties": {
+              "caffeine_mg": {
+                "type": "number"
+              },
+              "fluid_ml": {
+                "type": "number"
+              },
+              "macros": {
+                "description": "Calories and macros. Estimates, not lab-measured; not for insulin dosing.",
+                "properties": {
+                  "carb_g": {
+                    "type": "number"
+                  },
+                  "fat_g": {
+                    "type": "number"
+                  },
+                  "kcal": {
+                    "type": "number"
+                  },
+                  "protein_g": {
+                    "type": "number"
+                  }
+                },
+                "required": [],
+                "type": "object"
+              },
+              "name": {
+                "type": "string"
+              },
+              "quantity": {
+                "type": "string"
+              },
+              "source": {
+                "description": "Where the macros came from (e.g. usda, off, client).",
+                "type": "string"
+              }
+            },
+            "required": [
+              "name"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "local_date": {
+          "description": "A local date, YYYY-MM-DD.",
+          "type": "string"
+        },
+        "meal": {
+          "description": "breakfast, lunch, dinner or snack, when set.",
+          "type": "string"
+        },
+        "note": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "at",
+        "local_date",
+        "items"
+      ],
+      "type": "object"
+    }
+  },
+  "required": [
+    "entry",
+    "day_totals"
+  ],
+  "type": "object"
+}

Changed7 schema fields changedSep 30, 2026

changedInput schema / properties / macros / description

Previous value: -"Corrected macros — only the components you send are changed."New value: +"Corrected macros. Only the components included are changed."

addedInput schema / properties / macros / properties / carb_g / description

Added value: +"Corrected total carbohydrate for the whole portion, in grams."

addedInput schema / properties / macros / properties / fat_g / description
```
Added value: +"Corrected total fat for the whole portion, in grams."
```

addedInput schema / properties / macros / properties / kcal / description

Added value: +"Corrected energy for the whole portion, in kilocalories."

addedInput schema / properties / macros / properties / protein_g / description
```
Added value: +"Corrected protein for the whole portion, in grams."
```
addedInput schema / properties / name / description
```
Added value: +"Corrected name of the food."
```
addedInput schema / properties / note / description
```
Added value: +"Replacement note for the entry."
```

Changed2 schema fields changedSep 29, 2026

changedInput schema / properties / id / description

Previous value: -"The entry id to edit (from get_day)."New value: +"The entry id, as returned when reading a day."

changedInput schema / properties / local_date / description

Previous value: -"YYYY-MM-DD diary date of the entry (from get_day)."New value: +"YYYY-MM-DD diary date of the entry."

AddedJul 6, 2026

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