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Costory: Your Finops MCP

by io.costory.app-api

update_virtual_dimension_draft

Upsert the virtual dimension draft for an existing virtualDimensionId — updates a pending draft or seeds one from published state when none exists (response may include warning: "Initialized draft from published state"). virtualDimensionId in inputs equals id from list/get/search. Use create_virtual_dimension_draft only for brand-new VDIMs. Call get_skill with skillId: "virtual-dimensions" first — see skill for allocation shapes and workflow. For a new telemetry allocation, discover a live integration metric via list_metrics with includeExternal: true and a specific search term, then persist inline externalMetric { provider, integrationId, metricName, aggregator, groupByFields }. For BigQuery/S3, also set dateColumn and metricColumn from the returned schema (first DATE / first NUMERIC) and gapFillingMethod (default FORWARD_FILL). Catalog-complete providers (Tsuga, Datadog, CloudWatch, Amplitude, Google Cloud Monitoring) do not need those fields. Do not set datasource on new reallocations (echo a leftover stored datasource unchanged unless the user asks to switch). bqName is immutable; use returned bqName for groupBy/filterCel in query. Declarative: rules is optional — omit to change only metadata (name, description, tagNames); when provided, fully replaces the rules array. Omitting rules on a published-only VDIM still persists a draft (metadata-only promotion). Carry forward each existing rule's id and allocation from get; ids are sticky — reorder by moving id with its rule. Do not include leftover in rules. Rejects invalid payloads — nothing persisted unless validation passes. On success: values, draftValidation: { ok: true }, draftPersisted: true. Does not publish or refresh BigQuery. Clerk MCP only. EXAMPLE: "Add staging to Environment VDIM" — rules is the full desired set → { virtualDimensionId: "<id from create/list>", rules: [{ id: "", name: "Production", conditionCel: "cos_environment in ["prod"]", allocation: { allocationType: "dimensionValue", dimensionValue: "prod" } }, { name: "Staging", conditionCel: "cos_environment in ["staging"]", allocation: { allocationType: "dimensionValue", dimensionValue: "staging" } }] }

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNoOptional rename for the draft.
slugNoOrganization slug. Omit to auto-detect from your account (fails if you belong to multiple orgs).
rulesNoFull desired ordered rules array (declarative, not diffs). Omit to keep the current draft rules unchanged and edit only name/description/tags. Omitting rules on a published-only VDIM still persists a draft (metadata-only promotion path).
tagNamesNoReplace tags when provided (created if missing)
descriptionNoOptional draft description patch.
virtualDimensionIdYesVirtual dimension id (stable public identifier)

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed1 schema field changed
    • changedInput schema / properties / rules / items / properties / allocation / oneOf
      Previous value: -[
-  {
-    "properties": {
-      "allocationType": {
-        "const": "dimensionValue",
-        "type": "string"
-      },
-      "dimensionValue": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "allocationType",
-      "dimensionValue"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "allocationType": {
-        "const": "existingColumn",
-        "type": "string"
-      },
-      "existingColumn": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "allocationType",
-      "existingColumn"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "allocationType": {
-        "const": "splitCost",
-        "type": "string"
-      },
-      "reAllocationParams": {
-        "discriminator": {
-          "propertyName": "type"
-        },
-        "oneOf": [
-          {
-            "properties": {
-              "partitions": {
-                "items": {
-                  "properties": {
-                    "label": {
-                      "minLength": 1,
-                      "type": "string"
-                    },
-                    "weight": {
-                      "type": "number"
-                    }
-                  },
-                  "required": [
-                    "label",
-                    "weight"
-                  ],
-                  "type": "object"
-                },
-                "type": "array"
-              },
-              "type": {
-                "const": "custom",
-                "type": "string"
-              }
-            },
-            "required": [
-              "type",
-              "partitions"
-            ],
-            "type": "object"
-          }
-        ]
-      }
-    },
-    "required": [
-      "allocationType",
-      "reAllocationParams"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "allocationType": {
-        "const": "telemetry",
-        "type": "string"
-      },
-      "datasource": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "externalMetric": {
-        "properties": {
-          "aggregator": {
-            "enum": [
-              "SUM",
-              "AVG",
-              "MAX",
-              "MIN"
-            ],
-            "type": "string"
-          },
-          "conditions": {
-            "type": "string"
-          },
-          "dateColumn": {
-            "minLength": 1,
-            "type": "string"
-          },
-          "gapFillingMethod": {
-            "enum": [
-              "ZERO",
-              "FORWARD_FILL",
-              "LINEAR_INTERPOLATION",
-              "SPREAD"
-            ],
-            "type": "string"
-          },
-          "groupByFields": {
-            "default": [],
-            "items": {
-              "minLength": 1,
-              "type": "string"
-            },
-            "maxItems": 7,
-            "type": "array"
-          },
-          "integrationId": {
-            "description": "External metric integration ID from list_metrics(includeExternal: true).",
-            "minLength": 1,
-            "type": "string"
-          },
-          "metricColumn": {
-            "minLength": 1,
-            "type": "string"
-          },
-          "metricName": {
-            "default": "",
-            "type": "string"
-          },
-          "provider": {
-            "enum": [
-              "tsuga",
-              "bigquery",
-              "datadog",
-              "cloudwatch",
-              "s3",
-              "amplitude",
-              "snowflake"
-            ],
-            "type": "string"
-          },
-          "query": {
-            "minLength": 1,
-            "type": "string"
-          }
-        },
-        "required": [
-          "provider",
-          "integrationId"
-        ],
-        "type": "object"
-      },
-      "mappingParams": {
-        "properties": {
-          "mapping": {
-            "additionalProperties": {
-              "type": "string"
-            },
-            "propertyNames": {
-              "type": "string"
-            },
-            "type": "object"
-          }
-        },
-        "required": [
-          "mapping"
-        ],
-        "type": "object"
-      },
-      "mappingType": {
-        "enum": [
-          "mapping",
-          "regexMapping",
-          "identity"
-        ],
-        "type": "string"
-      },
-      "regexTransformation": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "allocationType",
-      "mappingType",
-      "mappingParams"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "properties": {
+      "allocationType": {
+        "const": "dimensionValue",
+        "type": "string"
+      },
+      "dimensionValue": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "allocationType",
+      "dimensionValue"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "allocationType": {
+        "const": "existingColumn",
+        "type": "string"
+      },
+      "existingColumn": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "allocationType",
+      "existingColumn"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "allocationType": {
+        "const": "splitCost",
+        "type": "string"
+      },
+      "reAllocationParams": {
+        "discriminator": {
+          "propertyName": "type"
+        },
+        "oneOf": [
+          {
+            "properties": {
+              "partitions": {
+                "items": {
+                  "properties": {
+                    "label": {
+                      "minLength": 1,
+                      "type": "string"
+                    },
+                    "weight": {
+                      "type": "number"
+                    }
+                  },
+                  "required": [
+                    "label",
+                    "weight"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "type": {
+                "const": "custom",
+                "type": "string"
+              }
+            },
+            "required": [
+              "type",
+              "partitions"
+            ],
+            "type": "object"
+          }
+        ]
+      }
+    },
+    "required": [
+      "allocationType",
+      "reAllocationParams"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "allocationType": {
+        "const": "telemetry",
+        "type": "string"
+      },
+      "datasource": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "externalMetric": {
+        "properties": {
+          "aggregator": {
+            "enum": [
+              "SUM",
+              "AVG",
+              "MAX",
+              "MIN"
+            ],
+            "type": "string"
+          },
+          "conditions": {
+            "type": "string"
+          },
+          "dateColumn": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "gapFillingMethod": {
+            "enum": [
+              "ZERO",
+              "FORWARD_FILL",
+              "LINEAR_INTERPOLATION",
+              "SPREAD"
+            ],
+            "type": "string"
+          },
+          "groupByFields": {
+            "default": [],
+            "items": {
+              "minLength": 1,
+              "type": "string"
+            },
+            "maxItems": 7,
+            "type": "array"
+          },
+          "integrationId": {
+            "description": "External metric integration ID from list_metrics(includeExternal: true).",
+            "minLength": 1,
+            "type": "string"
+          },
+          "metricColumn": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "metricName": {
+            "default": "",
+            "type": "string"
+          },
+          "provider": {
+            "enum": [
+              "tsuga",
+              "bigquery",
+              "datadog",
+              "cloudwatch",
+              "s3",
+              "amplitude",
+              "snowflake",
+              "cloudmonitoring"
+            ],
+            "type": "string"
+          },
+          "query": {
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "provider",
+          "integrationId"
+        ],
+        "type": "object"
+      },
+      "mappingParams": {
+        "properties": {
+          "mapping": {
+            "additionalProperties": {
+              "type": "string"
+            },
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          }
+        },
+        "required": [
+          "mapping"
+        ],
+        "type": "object"
+      },
+      "mappingType": {
+        "enum": [
+          "mapping",
+          "regexMapping",
+          "identity"
+        ],
+        "type": "string"
+      },
+      "regexTransformation": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "allocationType",
+      "mappingType",
+      "mappingParams"
+    ],
+    "type": "object"
+  }
+]
  2. Changed1 schema field changed
    • changedInput schema / properties / rules / items / properties / allocation / oneOf
      Previous value: -[
-  {
-    "properties": {
-      "allocationType": {
-        "const": "dimensionValue",
-        "type": "string"
-      },
-      "dimensionValue": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "allocationType",
-      "dimensionValue"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "allocationType": {
-        "const": "existingColumn",
-        "type": "string"
-      },
-      "existingColumn": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "allocationType",
-      "existingColumn"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "allocationType": {
-        "const": "splitCost",
-        "type": "string"
-      },
-      "reAllocationParams": {
-        "discriminator": {
-          "propertyName": "type"
-        },
-        "oneOf": [
-          {
-            "properties": {
-              "partitions": {
-                "items": {
-                  "properties": {
-                    "label": {
-                      "minLength": 1,
-                      "type": "string"
-                    },
-                    "weight": {
-                      "type": "number"
-                    }
-                  },
-                  "required": [
-                    "label",
-                    "weight"
-                  ],
-                  "type": "object"
-                },
-                "type": "array"
-              },
-              "type": {
-                "const": "custom",
-                "type": "string"
-              }
-            },
-            "required": [
-              "type",
-              "partitions"
-            ],
-            "type": "object"
-          }
-        ]
-      }
-    },
-    "required": [
-      "allocationType",
-      "reAllocationParams"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "allocationType": {
-        "const": "telemetry",
-        "type": "string"
-      },
-      "datasource": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "externalMetric": {
-        "properties": {
-          "aggregator": {
-            "enum": [
-              "SUM",
-              "AVG",
-              "MAX",
-              "MIN"
-            ],
-            "type": "string"
-          },
-          "conditions": {
-            "type": "string"
-          },
-          "dateColumn": {
-            "minLength": 1,
-            "type": "string"
-          },
-          "gapFillingMethod": {
-            "enum": [
-              "ZERO",
-              "FORWARD_FILL",
-              "LINEAR_INTERPOLATION",
-              "SPREAD"
-            ],
-            "type": "string"
-          },
-          "groupByFields": {
-            "default": [],
-            "items": {
-              "minLength": 1,
-              "type": "string"
-            },
-            "maxItems": 7,
-            "type": "array"
-          },
-          "integrationId": {
-            "description": "External metric integration ID from list_metrics(includeExternal: true).",
-            "minLength": 1,
-            "type": "string"
-          },
-          "metricColumn": {
-            "minLength": 1,
-            "type": "string"
-          },
-          "metricName": {
-            "default": "",
-            "type": "string"
-          },
-          "provider": {
-            "enum": [
-              "tsuga",
-              "bigquery",
-              "datadog",
-              "cloudwatch",
-              "s3",
-              "amplitude"
-            ],
-            "type": "string"
-          },
-          "query": {
-            "minLength": 1,
-            "type": "string"
-          }
-        },
-        "required": [
-          "provider",
-          "integrationId"
-        ],
-        "type": "object"
-      },
-      "mappingParams": {
-        "properties": {
-          "mapping": {
-            "additionalProperties": {
-              "type": "string"
-            },
-            "propertyNames": {
-              "type": "string"
-            },
-            "type": "object"
-          }
-        },
-        "required": [
-          "mapping"
-        ],
-        "type": "object"
-      },
-      "mappingType": {
-        "enum": [
-          "mapping",
-          "regexMapping",
-          "identity"
-        ],
-        "type": "string"
-      },
-      "regexTransformation": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "allocationType",
-      "mappingType",
-      "mappingParams"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "properties": {
+      "allocationType": {
+        "const": "dimensionValue",
+        "type": "string"
+      },
+      "dimensionValue": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "allocationType",
+      "dimensionValue"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "allocationType": {
+        "const": "existingColumn",
+        "type": "string"
+      },
+      "existingColumn": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "allocationType",
+      "existingColumn"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "allocationType": {
+        "const": "splitCost",
+        "type": "string"
+      },
+      "reAllocationParams": {
+        "discriminator": {
+          "propertyName": "type"
+        },
+        "oneOf": [
+          {
+            "properties": {
+              "partitions": {
+                "items": {
+                  "properties": {
+                    "label": {
+                      "minLength": 1,
+                      "type": "string"
+                    },
+                    "weight": {
+                      "type": "number"
+                    }
+                  },
+                  "required": [
+                    "label",
+                    "weight"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "type": {
+                "const": "custom",
+                "type": "string"
+              }
+            },
+            "required": [
+              "type",
+              "partitions"
+            ],
+            "type": "object"
+          }
+        ]
+      }
+    },
+    "required": [
+      "allocationType",
+      "reAllocationParams"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "allocationType": {
+        "const": "telemetry",
+        "type": "string"
+      },
+      "datasource": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "externalMetric": {
+        "properties": {
+          "aggregator": {
+            "enum": [
+              "SUM",
+              "AVG",
+              "MAX",
+              "MIN"
+            ],
+            "type": "string"
+          },
+          "conditions": {
+            "type": "string"
+          },
+          "dateColumn": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "gapFillingMethod": {
+            "enum": [
+              "ZERO",
+              "FORWARD_FILL",
+              "LINEAR_INTERPOLATION",
+              "SPREAD"
+            ],
+            "type": "string"
+          },
+          "groupByFields": {
+            "default": [],
+            "items": {
+              "minLength": 1,
+              "type": "string"
+            },
+            "maxItems": 7,
+            "type": "array"
+          },
+          "integrationId": {
+            "description": "External metric integration ID from list_metrics(includeExternal: true).",
+            "minLength": 1,
+            "type": "string"
+          },
+          "metricColumn": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "metricName": {
+            "default": "",
+            "type": "string"
+          },
+          "provider": {
+            "enum": [
+              "tsuga",
+              "bigquery",
+              "datadog",
+              "cloudwatch",
+              "s3",
+              "amplitude",
+              "snowflake"
+            ],
+            "type": "string"
+          },
+          "query": {
+            "minLength": 1,
+            "type": "string"
+          }
+        },
+        "required": [
+          "provider",
+          "integrationId"
+        ],
+        "type": "object"
+      },
+      "mappingParams": {
+        "properties": {
+          "mapping": {
+            "additionalProperties": {
+              "type": "string"
+            },
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          }
+        },
+        "required": [
+          "mapping"
+        ],
+        "type": "object"
+      },
+      "mappingType": {
+        "enum": [
+          "mapping",
+          "regexMapping",
+          "identity"
+        ],
+        "type": "string"
+      },
+      "regexTransformation": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "allocationType",
+      "mappingType",
+      "mappingParams"
+    ],
+    "type": "object"
+  }
+]
  3. First observed

TDQS

A5/5.0
Behavior5/5

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

The description discloses far more than annotations provide: upsert side effects, a possible initialization warning, declarative rules replacement semantics, sticky rule ids, immutable bqName, validation failure behavior ('nothing persisted unless validation passes'), success response shape, and the fact that it does not publish or refresh BigQuery. This is exceptionally transparent for a mutation tool.

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?

The description is long but every sentence carries operational value, covering workflow, edge cases, and constraints. The purpose statement is front-loaded, followed by usage routing and only then detailed parameter semantics. The example concretely demonstrates the expected payload shape without redundancy.

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?

Given the tool's complexity, sparse annotations, and lack of an output schema, the description is remarkably complete. It explains prerequisites, success and warning responses, validation behavior, immutable fields, rule-id stickiness, and the scope of what the tool does and does not do. An agent has enough context to invoke it correctly in both simple and advanced scenarios.

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

Parameters5/5

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

Although schema coverage is 100%, the description adds substantial parameter meaning beyond the schema: how virtualDimensionId maps to returned ids, when to omit rules, how to configure externalMetric with required discovery steps, BigQuery/S3 required fields, catalog-complete provider exceptions, and the datasource leftover echo rule. It transforms raw schema fields into actionable usage knowledge.

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 opens with a specific verb and resource: it 'Upserts the virtual dimension draft for an existing virtualDimensionId' and explains both the update and seed-from-published behaviors. It explicitly distinguishes itself from create_virtual_dimension_draft, so an agent can select it correctly without ambiguity.

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?

The description gives explicit when-to-use guidance: use create_virtual_dimension_draft only for brand-new VDIMs, and call get_skill first for allocation shapes and workflow. It also provides a concrete discovery workflow for telemetry metrics via list_metrics and states what to omit or preserve, leaving no doubt about when this tool is appropriate.

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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TDQS

A4.1/5.0
Disambiguation4/5

Tools are organized by resource (alerts, dashboards, reports, events, virtual dimensions) with distinct actions, so most are clearly separable. The main confusion risks are the three report-delivery side-effect tools (run_report_now, retry_report_execution, transfer_report_execution) and the generic get that spans five resource types, though detailed descriptions mitigate these.

Naming Consistency4/5

The dominant verb_noun pattern (create_*, list_*, update_*, preview_*, get_*) is consistent and predictable across the set. Deviations like bare verbs query/search/get and the noun-only virtual_dimension_overlap_matrix are readable but break the otherwise uniform convention.

Tool Count3/5

44 tools is heavy and exceeds the comfortable range, but the server covers a genuinely broad FinOps platform spanning querying, dashboards, reports, alerts, events, virtual dimensions, docs, skills, and suggestions. Each tool has a distinct job, though the sheer count makes agent navigation harder.

Completeness3/5

Core workflows are well covered: query → dashboard/report/alert/event, plus a full virtual-dimension draft lifecycle. Notable gaps include alerts being create-only with no update/delete, no deletes for dashboards/events/published virtual dimensions, and budget management limited to query/get with no create/update.

Resources