Bankstatemently

Transaction Time Series

time_series

Read-only

Compute a time series by grouping transactions into week or month buckets and applying a metric — useful for trends. Scope defaults to all your completed statements; pass "scope" to narrow to specific accounts/products and/or a date range.

Input Schema

TableJSON Schema

Name	Required	Description
`scope`	No	Optional structural scope (WHO × WHEN). Omit to search across all your completed statements. "accounts" is a list of account/product chips (kind + identityKey); "dateRange" bounds by transaction date (YYYY-MM-DD).
`bucket`	Yes	Bucket size.
`filter`	No	Subset of transactions to operate on. All fields are optional and combined with AND logic.
`metric`	Yes	Metric per bucket.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`scope`	Yes
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedSep 10, 2026

addedOutput schema / $defs

Added value: +{
+  "__schema0": {
+    "anyOf": [
+      {
+        "type": "string"
+      },
+      {
+        "type": "number"
+      },
+      {
+        "type": "boolean"
+      },
+      {
+        "type": "null"
+      },
+      {
+        "items": {
+          "$ref": "#/$defs/__schema0"
+        },
+        "type": "array"
+      },
+      {
+        "additionalProperties": {
+          "$ref": "#/$defs/__schema0"
+        },
+        "propertyNames": {
+          "type": "string"
+        },
+        "type": "object"
+      }
+    ]
+  }
+}

changedOutput schema / properties / result / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  },
-  {
-    "items": {
-      "additionalProperties": {},
-      "properties": {},
-      "type": "object"
-    },
-    "type": "array"
-  }
-]New value: +[
+  {
+    "additionalProperties": {
+      "$ref": "#/$defs/__schema0"
+    },
+    "propertyNames": {
+      "type": "string"
+    },
+    "type": "object"
+  },
+  {
+    "items": {
+      "additionalProperties": {
+        "$ref": "#/$defs/__schema0"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "type": "array"
+  }
+]

changedOutput schema / properties / scope / additionalProperties
```
Previous value: -{}New value: +false
```

Changed22 schema fields changedSep 4, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

addedInput schema / properties / bucket / description
```
Added value: +"Bucket size."
```

addedInput schema / properties / filter / description

Added value: +"Subset of transactions to operate on. All fields are optional and combined with AND logic."

addedInput schema / properties / filter / properties / accounts / description
```
Added value: +"Account number slugs to include."
```
addedInput schema / properties / filter / properties / amountMax / description
```
Added value: +"Inclusive maximum absolute amount."
```
addedInput schema / properties / filter / properties / amountMin / description
```
Added value: +"Inclusive minimum absolute amount."
```

addedInput schema / properties / filter / properties / category / description

Added value: +"Category slug, e.g. \"meals_entertainment\", \"groceries_personal\"."

addedInput schema / properties / filter / properties / currency / description
```
Added value: +"ISO 4217 currency code. E.g. \"USD\", \"HKD\"."
```
addedInput schema / properties / filter / properties / dateEnd / description
```
Added value: +"ISO date (YYYY-MM-DD). Inclusive upper bound."
```
addedInput schema / properties / filter / properties / dateStart / description
```
Added value: +"ISO date (YYYY-MM-DD). Inclusive lower bound."
```
addedInput schema / properties / filter / properties / direction / description
```
Added value: +"Semantic direction."
```

addedInput schema / properties / filter / properties / merchant / description

Added value: +"Substring match against description or counterparty (case-insensitive)."

addedInput schema / properties / filter / properties / text / description

Added value: +"Whole-row text search over raw transaction fields (case-insensitive)."

addedInput schema / properties / metric / description
```
Added value: +"Metric per bucket."
```

addedInput schema / properties / scope / description

Added value: +"Optional structural scope (WHO × WHEN). Omit to search across all your completed statements. \"accounts\" is a list of account/product chips (kind + identityKey); \"dateRange\" bounds by transaction date (YYYY-MM-DD)."

addedInput schema / properties / scope / properties / accounts / description

Added value: +"Account/product chips (kind + identityKey) to scope to. Empty = all accounts."

removedInput schema / properties / scope / properties / accounts / items / anyOf

Removed value: -[
-  {
-    "properties": {
-      "anchorContentHash": {
-        "type": "string"
-      },
-      "identityKey": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "account",
-        "type": "string"
-      },
-      "label": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "identityKey"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "identityKey": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "product",
-        "type": "string"
-      },
-      "label": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "identityKey"
-    ],
-    "type": "object"
-  }
-]

addedInput schema / properties / scope / properties / accounts / items / oneOf

Added value: +[
+  {
+    "properties": {
+      "anchorContentHash": {
+        "description": "Document-anchored lookup when present (results page); omit for a user-scoped lookup (workspace surfaces).",
+        "type": "string"
+      },
+      "identityKey": {
+        "description": "Canonical account identity key (accountIdentityKey), never a raw DB UUID.",
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "account",
+        "description": "This chip addresses a single account.",
+        "type": "string"
+      },
+      "label": {
+        "description": "Display label for this chip.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "identityKey"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "identityKey": {
+        "description": "Product slug.",
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "product",
+        "description": "This chip addresses a product and expands to its child accounts.",
+        "type": "string"
+      },
+      "label": {
+        "description": "Display label for this chip.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "identityKey"
+    ],
+    "type": "object"
+  }
+]

addedInput schema / properties / scope / properties / dateRange / description

Added value: +"Bounds results to transactions within this date range. Omit for no date filter."

addedInput schema / properties / scope / properties / dateRange / properties / from / description
```
Added value: +"Start of the date range (inclusive), YYYY-MM-DD."
```
addedInput schema / properties / scope / properties / dateRange / properties / to / description
```
Added value: +"End of the date range (inclusive), YYYY-MM-DD."
```

changedOutput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Changed20 schema fields changedAug 21, 2026

removedInput schema / properties / bucket / description
```
Removed value: -"Bucket size."
```

removedInput schema / properties / filter / description

Removed value: -"Subset of transactions to operate on. All fields are optional and combined with AND logic."

removedInput schema / properties / filter / properties / accounts / description
```
Removed value: -"Account number slugs to include."
```
removedInput schema / properties / filter / properties / amountMax / description
```
Removed value: -"Inclusive maximum absolute amount."
```
removedInput schema / properties / filter / properties / amountMin / description
```
Removed value: -"Inclusive minimum absolute amount."
```

removedInput schema / properties / filter / properties / category / description

Removed value: -"Category slug, e.g. \"meals_entertainment\", \"groceries_personal\"."

removedInput schema / properties / filter / properties / currency / description
```
Removed value: -"ISO 4217 currency code. E.g. \"USD\", \"HKD\"."
```
removedInput schema / properties / filter / properties / dateEnd / description
```
Removed value: -"ISO date (YYYY-MM-DD). Inclusive upper bound."
```
removedInput schema / properties / filter / properties / dateStart / description
```
Removed value: -"ISO date (YYYY-MM-DD). Inclusive lower bound."
```
removedInput schema / properties / filter / properties / direction / description
```
Removed value: -"Semantic direction."
```

removedInput schema / properties / filter / properties / merchant / description

Removed value: -"Substring match against description or counterparty (case-insensitive)."

removedInput schema / properties / filter / properties / text / description

Removed value: -"Whole-row text search over raw transaction fields (case-insensitive)."

removedInput schema / properties / metric / description
```
Removed value: -"Metric per bucket."
```

removedInput schema / properties / scope / description

Removed value: -"Optional structural scope (WHO × WHEN). Omit to search across all your completed statements. \"accounts\" is a list of account/product chips (kind + identityKey); \"dateRange\" bounds by transaction date (YYYY-MM-DD)."

removedInput schema / properties / scope / properties / accounts / description

Removed value: -"Account/product chips (kind + identityKey) to scope to. Empty = all accounts."

addedInput schema / properties / scope / properties / accounts / items / anyOf

Added value: +[
+  {
+    "properties": {
+      "anchorContentHash": {
+        "type": "string"
+      },
+      "identityKey": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "account",
+        "type": "string"
+      },
+      "label": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "identityKey"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "identityKey": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "product",
+        "type": "string"
+      },
+      "label": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "identityKey"
+    ],
+    "type": "object"
+  }
+]

removedInput schema / properties / scope / properties / accounts / items / oneOf

Removed value: -[
-  {
-    "properties": {
-      "anchorContentHash": {
-        "description": "Document-anchored lookup when present (results page); omit for a user-scoped lookup (workspace surfaces).",
-        "type": "string"
-      },
-      "identityKey": {
-        "description": "Canonical account identity key (accountIdentityKey), never a raw DB UUID.",
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "account",
-        "description": "This chip addresses a single account.",
-        "type": "string"
-      },
-      "label": {
-        "description": "Display label for this chip.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "identityKey"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "identityKey": {
-        "description": "Product slug.",
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "product",
-        "description": "This chip addresses a product and expands to its child accounts.",
-        "type": "string"
-      },
-      "label": {
-        "description": "Display label for this chip.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "identityKey"
-    ],
-    "type": "object"
-  }
-]

removedInput schema / properties / scope / properties / dateRange / description

Removed value: -"Bounds results to transactions within this date range. Omit for no date filter."

removedInput schema / properties / scope / properties / dateRange / properties / from / description
```
Removed value: -"Start of the date range (inclusive), YYYY-MM-DD."
```
removedInput schema / properties / scope / properties / dateRange / properties / to / description
```
Removed value: -"End of the date range (inclusive), YYYY-MM-DD."
```

First observedAug 12, 2026

TDQS

A4.1/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds that the default scope is all completed statements and that filtering is via scope, which is useful. It doesn't mention output structure, but with an output schema present, that's less critical. The description doesn't contradict annotations and adds some context beyond them.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise, two sentences, with the core purpose front-loaded. The first sentence clearly states what the tool does)Skip the second adds essential context on scope defaults. It's efficient with no fluff, but could be slightly more structured with explicit when-to-use guidance.

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

Completeness4/5

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

For a tool with an output schema, 4 parameters, and nested objects, the description is adequate. It explains the core operation, the scope mechanism, and the default behavior. It doesn't detail return format, but output schema covers that. The only missing piece is explicit differentiation from siblings, but the description's clarity on time-series makes it usable. Overall, it's complete enough for an agent to invoke correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so every parameter is documented in the schema. The description adds meaning by explaining that bucket groups into week/month and metric is applied per bucket, and that scope narrows to specific accounts/products and date range. It also clarifies that scope defaults to all completed statements, which is not in the schema. This adds value beyond the schema's field descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description explicitly states the tool computes a time series by grouping transactions into week/month buckets and applying a metric, which is a specific verb plus resource. It also mentions it's for trends, and the scope default is clear. This distinguishes it from siblings like group_by or top_n because it focuses on temporal bucketing.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It clearly states when to use it (for trends over time) and how to narrow the scope (pass 'scope'). It doesn't explicitly name alternatives, but the sibling list includes group_by and top_n which are related; the description implies the distinguishing factor is time series. It could be improved by explicitly saying 'use this instead of group_by when you need time-bucketed aggregation'.

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

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