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Microsoft 365 MCP Server

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TypeScript
Hybrid

get-drive-root-item

get-drive-root-item
Read-only

Get the root folder of a Microsoft 365 drive using its drive ID. This read-only action returns the top-level item for OneDrive or SharePoint drives.

Instructions

The root folder of the drive. Read-only.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
expandNoNavigation properties to inline, e.g. attachments on a message or event. Only navigation properties can be expanded: expanding a non-navigation property such as a message body fails with "Parsing OData Select and Expand failed", and an unsupported value may be ignored rather than reported. Request ordinary fields with $select instead.
selectNoComma-separated fields to return, e.g. id,subject,from,receivedDateTime
driveIdYesValue for the 'driveId' path segment. Pass it under the name 'driveId', not as 'id'. Use the 'id' field of the drive object as returned by Microsoft Graph.
fetchAllPagesNoFollow @odata.nextLink and merge up to 100 pages into one response. Can return enormous payloads—only when the user explicitly needs a full export. Prefer a small $top first, then paginate or narrow with $filter/$search.
includeHeadersNoInclude response headers (including ETag) in the response metadata
excludeResponseNoExclude the full response body and only return success or failure indication

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed5 schema fields changedv0.154.2
    • addedInput schema / properties / expand / anyOf
      Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "items": {
+      "type": "string"
+    },
+    "type": "array"
+  }
+]
    • removedInput schema / properties / expand / items
      Removed value: -{
-  "type": "string"
-}
    • removedInput schema / properties / expand / type
      Removed value: -"array"
    • addedInput schema / properties / select / anyOf
      Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "items": {
+      "type": "string"
+    },
+    "type": "array"
+  }
+]
    • removedInput schema / properties / select / type
      Removed value: -"string"
  2. Addedv0.134.4
  3. Removedv0.131.2
  4. Addedv0.114.0
  5. Removedv0.112.2
  6. Addedv0.110.0
  7. Removedv0.108.0
  8. Changed4 schema fields changedv0.96.0
    • changedInput schema / properties / fetchAllPages / description
      Previous value: -"Automatically fetch all pages of results"New value: +"Follow @odata.nextLink and merge up to 100 pages into one response. Can return enormous payloads—only when the user explicitly needs a full export. Prefer a small $top first, then paginate or narrow with $filter/$search."
    • changedInput schema / properties / select / description
      Previous value: -"Select properties to be returned"New value: +"Comma-separated fields to return, e.g. id,subject,from,receivedDateTime"
    • removedInput schema / properties / select / items
      Removed value: -{
-  "type": "string"
-}
    • changedInput schema / properties / select / type
      Previous value: -"array"New value: +"string"
  9. First observedv0.31.0

TDQS

C2.5/5.0
Behavior2/5

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

Annotations already provide readOnlyHint=true and destructiveHint=false. The description's 'Read-only' duplicates that annotation without adding new behavioral context such as response format, auth requirements, or limitations. No extra value is provided.

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

Conciseness2/5

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

Extremely short, but the 'Read-only' phrase is redundant with the annotation. Every word does not earn its place; the resource clarification is useful, but the duplicate safety hint wastes space.

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

Completeness2/5

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

For a simple read operation with schema-covered parameters, the description identifies the resource correctly. However, it omits any mention of the return value structure, pagination, or how this differs from other drive-item tools. Given no output schema, an agent might expect more clarity about the response.

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 description coverage is 100%, so parameters are fully documented in the schema. The description adds no parameter-specific meaning, which aligns with the baseline of 3 given complete schema coverage.

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

Purpose4/5

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

Names the specific resource (the root folder of the drive) and implies the getter operation through the tool name. It is unambiguous and distinct from sibling get-drive-item, though it lacks an explicit verb like 'retrieves' or 'returns'.

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

Usage Guidelines1/5

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

No guidance on when to use this tool versus alternatives like get-drive-item or list-folder-files. The description does not mention any context, prerequisites, or exclusions.

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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