DC Hub

M&A Transactions

list_transactions

Read-onlyIdempotent

Use this when the user asks about data center M&A, acquisitions or capital deals — tracked deals (2019-present; total_count in the result, where shown, gives the live number), each with its disclosed value where public (many private deals are undisclosed). Returns deal name, buyer, seller, value, date, market, target operator, type (acquisition/JV/refinance/recap). Filter by date range (date_from/date_to, ISO-8601), min_value_usd, region, buyer, or seller. Answers "which data-center deals closed this year", "what was that acquisition worth". Try: list_transactions date_from=2026-01-01 min_value_usd=1000000000. There is no year parameter — use date_from/date_to. Broad M&A and capital-deal flow with filters; do NOT use for hyperscaler-specific lease/PPA/JV activity (use hyperscaler_deals) or a single-deal post-mortem (use deal_autopsy). limit 1-500 (free 10), offset 0-100000; total_count is the full match count. Empty = loosen buyer/seller/value filters.

Input Schema

Name	Required	Description
`buyer`	No	Filter by acquiring company name, e.g. Blackstone, KKR, Digital Realty
`limit`	No	Max results to return (1-500; default varies by tool)
`offset`	No	Pagination offset, 0-based (skip this many results)
`region`	No	Geographic region filter, e.g. us, eu, apac, americas
`seller`	No	Filter by selling/target company name, e.g. CyrusOne
`date_to`	No	Latest deal date, ISO-8601 (YYYY-MM-DD)
`date_from`	No	Earliest deal date, ISO-8601 (YYYY-MM-DD)
`deal_type`	No	Deal type filter, e.g. acquisition, jv, refinance, recap
`max_value_usd`	No	Maximum disclosed deal value in US dollars
`min_value_usd`	No	Minimum disclosed deal value in US dollars, e.g. 1000000000 for $1B+

Output Schema

Name	Required	Description	Default
`note`	No
`tier`	No
`count`	No
`cached`	No
`success`	No
`data_source`	No
`total_count`	No
`total_value`	No
`transactions`	No
`total_value_unit`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedOct 19, 2026
- removedOutput schema / properties / _entity
```
Removed value: -{
-  "type": "string"
-}
```
- removedOutput schema / properties / _front_door
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / _return_loop
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / citation
```
Removed value: -{}
```
- removedOutput schema / properties / provenance
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / quota
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / site_evaluation_handoff
```
Removed value: -{}
```

Changed39 schema fields changedOct 18, 2026

changedOutput schema / additionalProperties
```
Previous value: -{}New value: +true
```

removedOutput schema / description

Removed value: -"Data-center M&A / capital transactions: `transactions` rows with buyer/seller/value/date — alongside the DC Hub envelope keys."

removedOutput schema / properties / _entity / description

Removed value: -"Payload class (facility|market|iso_grid|queue_results|deal|report|response); branch on it."

removedOutput schema / properties / _front_door / additionalProperties
```
Removed value: -{}
```

removedOutput schema / properties / _front_door / description

Removed value: -"First-tool hint: plan_query(intent) returns the ordered plan."

removedOutput schema / properties / _front_door / properties
```
Removed value: -{}
```
removedOutput schema / properties / _return_loop / additionalProperties
```
Removed value: -{}
```
removedOutput schema / properties / _return_loop / description
```
Removed value: -"Next-session delta call (get_changes)."
```
removedOutput schema / properties / _return_loop / properties
```
Removed value: -{}
```

removedOutput schema / properties / cached / anyOf

Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / cached / description

Removed value: -"Whether the response was served from cache"

removedOutput schema / properties / citation / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  },
-  {
-    "type": "string"
-  }
-]

removedOutput schema / properties / citation / description

Removed value: -"How to attribute DC Hub: {source, url, license, cite_as, retrieved_at}, or the attribution line as a string."

removedOutput schema / properties / count / anyOf

Removed value: -[
-  {
-    "anyOf": [
-      {
-        "type": "number"
-      },
-      {
-        "type": "string"
-      }
-    ]
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / count / description
```
Removed value: -"Rows returned in THIS response"
```

removedOutput schema / properties / data_source / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / data_source / description
```
Removed value: -"Where the deal set comes from"
```

removedOutput schema / properties / note / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / note / description
```
Removed value: -"Serving note"
```
removedOutput schema / properties / provenance / additionalProperties
```
Removed value: -{}
```

removedOutput schema / properties / provenance / description

Removed value: -"Source, method, as_of, verification_counts, license, cite_as; quote it when citing."

removedOutput schema / properties / provenance / properties
```
Removed value: -{}
```
removedOutput schema / properties / quota / additionalProperties
```
Removed value: -{}
```

removedOutput schema / properties / quota / description

Removed value: -"Caller quota state (remaining calls, tier)."

removedOutput schema / properties / quota / properties
```
Removed value: -{}
```

removedOutput schema / properties / site_evaluation_handoff / anyOf

Removed value: -[
-  {
-    "items": {
-      "additionalProperties": {},
-      "properties": {},
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  }
-]

removedOutput schema / properties / site_evaluation_handoff / description

Removed value: -"Follow-up calls [{tool, parameters, why}] when the payload carries coordinates."

removedOutput schema / properties / success / anyOf

Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / success / description
```
Removed value: -"true when the deal query succeeded"
```

removedOutput schema / properties / tier / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / tier / description
```
Removed value: -"Tier the response was served at"
```

removedOutput schema / properties / total_count / anyOf

Removed value: -[
-  {
-    "anyOf": [
-      {
-        "type": "number"
-      },
-      {
-        "type": "string"
-      }
-    ]
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / total_count / description
```
Removed value: -"Total deals matching the filter"
```

removedOutput schema / properties / total_value / anyOf

Removed value: -[
-  {
-    "anyOf": [
-      {
-        "type": "number"
-      },
-      {
-        "type": "string"
-      }
-    ]
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / total_value / description

Removed value: -"Aggregate disclosed value across the returned set (null when not computed)"

removedOutput schema / properties / total_value_unit / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / total_value_unit / description
```
Removed value: -"Unit of total_value"
```

removedOutput schema / properties / transactions / anyOf

Removed value: -[
-  {
-    "items": {
-      "additionalProperties": {},
-      "properties": {
-        "buyer": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Acquirer"
-        },
-        "date": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Deal date (ISO-8601)"
-        },
-        "id": {
-          "anyOf": [
-            {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "string"
-                }
-              ]
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Deal id"
-        },
-        "market": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Market the deal touches"
-        },
-        "mw": {
-          "anyOf": [
-            {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "string"
-                }
-              ]
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Capacity involved, MW, when disclosed"
-        },
-        "region": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Region (us | eu | apac | americas …)"
-        },
-        "seller": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Seller / target"
-        },
-        "type": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "acquisition | jv | refinance | recap …"
-        },
-        "value": {
-          "anyOf": [
-            {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "string"
-                }
-              ]
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Deal value when disclosed (see value_unit)"
-        },
-        "value_confirmed": {
-          "anyOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Whether the value is confirmed vs reported"
-        },
-        "value_display": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Human-formatted value, e.g. \"$9.2B\" or \"Undisclosed\""
-        },
-        "value_unit": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Unit of `value` (e.g. USD)"
-        },
-        "year": {
-          "anyOf": [
-            {
-              "anyOf": [
-                {
-                  "type": "number"
-                },
-                {
-                  "type": "string"
-                }
-              ]
-            },
-            {
-              "type": "null"
-            }
-          ],
-          "description": "Deal year"
-        }
-      },
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / transactions / description
```
Removed value: -"M&A / capital-transaction rows"
```

AddedOct 9, 2026
RemovedSep 29, 2026

Changed2 schema fields changedAug 21, 2026

removedInput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

removedOutput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

Changed5 schema fields changedAug 11, 2026

removedOutput schema / properties / citation / additionalProperties
```
Removed value: -{}
```

addedOutput schema / properties / citation / anyOf

Added value: +[
+  {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  },
+  {
+    "type": "string"
+  }
+]

changedOutput schema / properties / citation / description

Previous value: -"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload."New value: +"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload. Normally an OBJECT {source, url, license, cite_as, retrieved_at}; a bare string is accepted and carries the attribution line itself."

removedOutput schema / properties / citation / properties
```
Removed value: -{}
```
removedOutput schema / properties / citation / type
```
Removed value: -"object"
```

Changed1 schema field changedJul 21, 2026

addedOutput schema / properties / _front_door

Added value: +{
+  "additionalProperties": {},
+  "description": "In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan.",
+  "properties": {},
+  "type": "object"
+}

Changed16 schema fields changedJul 18, 2026

changedOutput schema / description

Previous value: -"DC Hub envelope: structuredContent mirrors the JSON payload in content[0].text — tool-specific data fields ride at the top level alongside these envelope keys."New value: +"Data-center M&A / capital transactions: `transactions` rows with buyer/seller/value/date — alongside the DC Hub envelope keys."

addedOutput schema / properties / cached

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Whether the response was served from cache"
+}

addedOutput schema / properties / count

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Rows returned in THIS response"
+}

addedOutput schema / properties / data_source

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Where the deal set comes from"
+}

addedOutput schema / properties / note

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Serving note"
+}

removedOutput schema / properties / site_evaluation_handoff / additionalProperties
```
Removed value: -{}
```

addedOutput schema / properties / site_evaluation_handoff / anyOf

Added value: +[
+  {
+    "items": {
+      "additionalProperties": {},
+      "properties": {},
+      "type": "object"
+    },
+    "type": "array"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  }
+]

changedOutput schema / properties / site_evaluation_handoff / description

Previous value: -"Pre-built follow-up call (analyze_site / get_water_risk args) when the payload carries coordinates."New value: +"Pre-built follow-up calls (analyze_site / get_water_risk args) when the payload carries coordinates — an array of {tool, parameters, why} entries."

removedOutput schema / properties / site_evaluation_handoff / properties
```
Removed value: -{}
```
removedOutput schema / properties / site_evaluation_handoff / type
```
Removed value: -"object"
```

addedOutput schema / properties / success

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "true when the deal query succeeded"
+}

addedOutput schema / properties / tier

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Tier the response was served at"
+}

addedOutput schema / properties / total_count

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Total deals matching the filter"
+}

addedOutput schema / properties / total_value

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Aggregate disclosed value across the returned set (null when not computed)"
+}

addedOutput schema / properties / total_value_unit

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Unit of total_value"
+}

addedOutput schema / properties / transactions

Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "buyer": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Acquirer"
+          },
+          "date": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Deal date (ISO-8601)"
+          },
+          "id": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Deal id"
+          },
+          "market": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Market the deal touches"
+          },
+          "mw": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Capacity involved, MW, when disclosed"
+          },
+          "region": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Region (us | eu | apac | americas …)"
+          },
+          "seller": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Seller / target"
+          },
+          "type": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "acquisition | jv | refinance | recap …"
+          },
+          "value": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Deal value when disclosed (see value_unit)"
+          },
+          "value_confirmed": {
+            "anyOf": [
+              {
+                "type": "boolean"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Whether the value is confirmed vs reported"
+          },
+          "value_display": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Human-formatted value, e.g. \"$9.2B\" or \"Undisclosed\""
+          },
+          "value_unit": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Unit of `value` (e.g. USD)"
+          },
+          "year": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Deal year"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "M&A / capital-transaction rows"
+}

Changed1 schema field changedJul 17, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": {},
+  "description": "DC Hub envelope: structuredContent mirrors the JSON payload in content[0].text — tool-specific data fields ride at the top level alongside these envelope keys.",
+  "properties": {
+    "_entity": {
+      "description": "Payload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest.",
+      "type": "string"
+    },
+    "_return_loop": {
+      "additionalProperties": {},
+      "description": "Suggested next-session delta call (get_changes since=24h) so you pull only what changed.",
+      "properties": {},
+      "type": "object"
+    },
+    "citation": {
+      "additionalProperties": {},
+      "description": "Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload.",
+      "properties": {},
+      "type": "object"
+    },
+    "provenance": {
+      "additionalProperties": {},
+      "description": "Collection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing.",
+      "properties": {},
+      "type": "object"
+    },
+    "quota": {
+      "additionalProperties": {},
+      "description": "Caller quota state (remaining calls, tier) when available.",
+      "properties": {},
+      "type": "object"
+    },
+    "site_evaluation_handoff": {
+      "additionalProperties": {},
+      "description": "Pre-built follow-up call (analyze_site / get_water_risk args) when the payload carries coordinates.",
+      "properties": {},
+      "type": "object"
+    }
+  },
+  "type": "object"
+}

Changed14 schema fields changedJul 2, 2026

addedInput schema / properties / buyer / description

Added value: +"Filter by acquiring company name, e.g. Blackstone, KKR, Digital Realty"

addedInput schema / properties / date_from / description

Added value: +"Earliest deal date, ISO-8601 (YYYY-MM-DD)"

addedInput schema / properties / date_to / description

Added value: +"Latest deal date, ISO-8601 (YYYY-MM-DD)"

addedInput schema / properties / deal_type / description

Added value: +"Deal type filter, e.g. acquisition, jv, refinance, recap"

addedInput schema / properties / limit / description

Added value: +"Max results to return (1-500; default varies by tool)"

changedInput schema / properties / limit / maximum

Previous value: -9007199254740991New value: +500

changedInput schema / properties / limit / minimum

Previous value: --9007199254740991New value: +1

addedInput schema / properties / max_value_usd / description

Added value: +"Maximum disclosed deal value in US dollars"

addedInput schema / properties / min_value_usd / description

Added value: +"Minimum disclosed deal value in US dollars, e.g. 1000000000 for $1B+"

addedInput schema / properties / offset / description

Added value: +"Pagination offset, 0-based (skip this many results)"

changedInput schema / properties / offset / maximum

Previous value: -9007199254740991New value: +100000

changedInput schema / properties / offset / minimum

Previous value: --9007199254740991New value: +0

addedInput schema / properties / region / description

Added value: +"Geographic region filter, e.g. us, eu, apac, americas"

addedInput schema / properties / seller / description

Added value: +"Filter by selling/target company name, e.g. CyrusOne"

Changed27 schema fields changedApr 29, 2026
- addedInput schema / $schema
```
Added value: +"http://json-schema.org/draft-07/schema#"
```
- removedInput schema / properties / buyer / default
```
Removed value: -""
```
- removedInput schema / properties / buyer / title
```
Removed value: -"Buyer"
```
- removedInput schema / properties / date_from / default
```
Removed value: -""
```
- removedInput schema / properties / date_from / title
```
Removed value: -"Date From"
```
- removedInput schema / properties / date_to / default
```
Removed value: -""
```
- removedInput schema / properties / date_to / title
```
Removed value: -"Date To"
```
- removedInput schema / properties / deal_type / default
```
Removed value: -""
```
- removedInput schema / properties / deal_type / title
```
Removed value: -"Deal Type"
```
- removedInput schema / properties / limit / default
```
Removed value: -25
```
- addedInput schema / properties / limit / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / limit / minimum
```
Added value: +-9007199254740991
```
- removedInput schema / properties / limit / title
```
Removed value: -"Limit"
```
- removedInput schema / properties / max_value_usd / default
```
Removed value: -0
```
- removedInput schema / properties / max_value_usd / title
```
Removed value: -"Max Value Usd"
```
- removedInput schema / properties / min_value_usd / default
```
Removed value: -0
```
- removedInput schema / properties / min_value_usd / title
```
Removed value: -"Min Value Usd"
```
- removedInput schema / properties / offset / default
```
Removed value: -0
```
- addedInput schema / properties / offset / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / offset / minimum
```
Added value: +-9007199254740991
```
- removedInput schema / properties / offset / title
```
Removed value: -"Offset"
```
- removedInput schema / properties / region / default
```
Removed value: -""
```
- removedInput schema / properties / region / title
```
Removed value: -"Region"
```
- removedInput schema / properties / seller / default
```
Removed value: -""
```
- removedInput schema / properties / seller / title
```
Removed value: -"Seller"
```
- removedInput schema / title
```
Removed value: -"list_transactionsArguments"
```
- changedOutput schema / (root)
```
Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "list_transactionsOutput",
-  "type": "object"
-}New value: +null
```

Changed1 schema field changedApr 18, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "result": {
+      "title": "Result",
+      "type": "string"
+    }
+  },
+  "required": [
+    "result"
+  ],
+  "title": "list_transactionsOutput",
+  "type": "object"
+}

Changed1 schema field changedApr 11, 2026

changedOutput schema / (root)

Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "list_transactionsOutput",
-  "type": "object"
-}New value: +null

Changed1 schema field changedMar 31, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "result": {
+      "title": "Result",
+      "type": "string"
+    }
+  },
+  "required": [
+    "result"
+  ],
+  "title": "list_transactionsOutput",
+  "type": "object"
+}

Changed1 schema field changedMar 26, 2026

changedOutput schema / (root)

Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "list_transactionsOutput",
-  "type": "object"
-}New value: +null

First observedMar 6, 2026

TDQS

A4.3/5.0

Behavior3/5

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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety profile is covered. The description still adds real behavioral context beyond them: many private deal values are undisclosed, total_count reflects the live full match count, and free tier caps results at 10 despite limit going to 500. That lands above a pure annotation restatement but stops short of top marks because sort order and what a truncated response looks like are unstated.

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

Conciseness5/5

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

Front-loaded with the use case and scope in the first clause, then return fields, then filters, then the disambiguation and limits. Every sentence carries information an agent needs — even the example call and the empty-result hint earn their space as actionable guidance.

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

Completeness5/5

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

A ten-parameter, zero-required filter tool with an output schema and full annotation coverage is thoroughly covered: scope, field list, date/value/region/buyer/seller filters, pagination limits, tier cap, and failure-mode recovery are all present. Nothing an agent needs to make a correct first call is missing.

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

Parameters3/5

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

Schema coverage is 100%, so the schema already documents all ten parameters and the baseline would be 3. The description adds genuine meaning on top — the 500 vs free-10 limit split, total_count as the unfiltered match count, ISO-8601 date format, and the explicit absence of a `year` param — which is why it sits at the upper end rather than merely meeting baseline. Values are additive but not structural, so no push to 4.

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?

States a specific verb and resource (list tracked data-center M&A/acquisition/capital deals) with coverage window 2019-present and a concrete returned field set (deal name, buyer, seller, value, date, market, target operator, type). It explicitly distinguishes itself from siblings hyperscaler_deals and deal_autopsy, so an agent can route without opening either schema.

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

Usage Guidelines5/5

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

Gives when-to-use trigger questions ('which data-center deals closed this year', 'what was that acquisition worth'), explicit when-NOT-to-use with the correct alternative for each case, a worked example call, and a recovery hint for empty results ('loosen buyer/seller/value filters'). Also preempts a likely wrong parameter attempt ('There is no `year` parameter — use date_from/date_to').

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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