Skip to main content
Glama
Softeria

Microsoft 365 MCP Server

by Softeria
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

list-supported-time-zones

list-supported-time-zones
Read-only

Get the list of time zones that are supported for the user, as configured on the user's mailbox server. You can explicitly specify to have time zones returned in the Windows time zone format or Internet Assigned Numbers Authority (IANA)…

Instructions

Get the list of time zones that are supported for the user, as configured on the user's mailbox server. You can explicitly specify to have time zones returned in the Windows time zone format or Internet Assigned Numbers Authority (IANA) time zone (also known as Olson time zone) format. The Windows format is the default. When setting up an Outlook client, the user selects the preferred time zone from this supported list. You can subsequently get the preferred time zone by getting the user's mailbox settings.

💡 TIP: Lists time zones the user's mailbox server supports. TimeZoneStandard path parameter must be one of: Windows (default — Windows time zone names like 'Pacific Standard Time'), or Iana (IANA / Olson names like 'America/Los_Angeles'). Note the PascalCase — the values are case-sensitive enums, not lowercase strings. Returns timeZoneInformation objects with alias and displayName. Use the result to validate or look up the value before calling update-mailbox-settings to change the user's preferred timeZone, or before setting timeZone on a calendar event's start/end (especially for recurring events) — don't guess a time zone name from memory, look it up here.

Input Schema

NameRequiredDescriptionDefault
topNoPage size (Graph $top). Start small (e.g. 5–15) so responses fit the model context; raise only if needed. Use $select to return fewer fields per item. For more rows, use @odata.nextLink from the response instead of a very large $top.
skipNoItems to skip for pagination. Not supported with $search.
countNoSet true to enable advanced query mode (ConsistencyLevel: eventual). Required for complex $filter on flag/flagStatus or contains(). The response then includes @odata.count, the total for the filtered collection, which can exceed the items returned when fetchAllPages hits its page/item cap.
filterNoOData filter expression. Add $count=true for advanced filters (flag/flagStatus, contains()). Cannot combine with $search.
searchNoKQL search query in one pair of double quotes; directory (users/groups) instead quotes each clause with no outer pair. Cannot combine with $filter.
skiptokenNoNext page: the @odata.nextLink from the previous response. Keep the other arguments the same.
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
TimeZoneStandardYesValue for the 'TimeZoneStandard' path segment.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changedv0.166.0
    • changedInput schema / properties / count / description
      Previous value: -"Set true to enable advanced query mode (ConsistencyLevel: eventual). Required for complex $filter on flag/flagStatus or contains()."New value: +"Set true to enable advanced query mode (ConsistencyLevel: eventual). Required for complex $filter on flag/flagStatus or contains(). The response then includes @odata.count, the total for the filtered collection, which can exceed the items returned when fetchAllPages hits its page/item cap."
  2. Changed4 schema fields changedv0.154.2
    • addedInput schema / properties / skip / minimum
      Added value: +0
    • changedInput schema / properties / skip / type
      Previous value: -"number"New value: +"integer"
    • addedInput schema / properties / top / minimum
      Added value: +0
    • changedInput schema / properties / top / type
      Previous value: -"number"New value: +"integer"
  3. Changed1 schema field changedv0.154.0
    • changedInput schema / properties / skiptoken / description
      Previous value: -"Opaque cursor for the next page, taken from the previous response. Copy the $skiptoken value out of @odata.nextLink (or paste the whole nextLink URL — the token is extracted from it) and resend it with the SAME $filter/$select/$expand/$top as the first call. Use this to walk pages one at a time instead of fetchAllPages. Omit it for the first page."New value: +"Next page: the @odata.nextLink from the previous response. Keep the other arguments the same."
  4. Changed2 schema fields changedv0.153.0
    • changedInput schema / properties / search / description
      Previous value: -"KQL search query — wrap value in double quotes. Cannot combine with $filter."New value: +"KQL search query in one pair of double quotes; directory (users/groups) instead quotes each clause with no outer pair. Cannot combine with $filter."
    • addedInput schema / properties / skiptoken
      Added value: +{
+  "description": "Opaque cursor for the next page, taken from the previous response. Copy the $skiptoken value out of @odata.nextLink (or paste the whole nextLink URL — the token is extracted from it) and resend it with the SAME $filter/$select/$expand/$top as the first call. Use this to walk pages one at a time instead of fetchAllPages. Omit it for the first page.",
+  "type": "string"
+}
  5. Changed1 schema field changedv0.134.4
    • changedInput schema / properties / TimeZoneStandard / description
      Previous value: -"Path parameter: TimeZoneStandard"New value: +"Value for the 'TimeZoneStandard' path segment."
  6. Changed1 schema field changedv0.131.2
    • changedInput schema / additionalProperties
      Previous value: -falseNew value: +true
  7. Addedv0.114.0
  8. Removedv0.112.2
  9. Addedv0.110.0
  10. Removedv0.108.0
  11. Addedv0.105.0

TDQS

A4.5/5.0
Behavior4/5

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

Annotations already declare readOnlyHint/openWorldHint/destructiveHint=false, so safety is covered. The description adds genuine behavioral context beyond that: Windows is the default format, the TimeZoneStandard values are case-sensitive PascalCase enums, and the call returns timeZoneInformation objects with alias and displayName.

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

Conciseness3/5

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

The TIP is front-loaded and useful, but it duplicates the lead paragraph's statement of purpose ('Lists time zones the user's mailbox server supports'), and the format/default explanation appears twice (lead text and TIP). The duplicated material costs it despite otherwise good structure.

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?

No output schema exists, and the description compensates by describing the returned shape (timeZoneInformation with alias/displayName). Combined with the 100%-covered input schema and the safety annotations, an agent has everything needed to call it correctly without guessing.

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 baseline is 3, but the description adds meaning the schema lacks: the allowed values for the required TimeZoneStandard path segment (Windows vs Iana/Olson), the concrete name examples, and the case-sensitivity warning. It says nothing extra about top/skip/filter/fetchAllPages, which the schema already documents.

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+resource+scope: 'Get the list of time zones that are supported for the user, as configured on the user's mailbox server.' It also distinguishes itself from siblings by naming the consuming tools (update-mailbox-settings, calendar event start/end) rather than being confused with calendar- or mail-listing tools.

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?

Explicitly says when to use it: 'before calling update-mailbox-settings to change the user's preferred timeZone, or before setting timeZone on a calendar event's start/end … don't guess a time zone name from memory, look it up here.' It also names the reverse lookup path (get the preferred time zone via the user's mailbox settings), so the agent has both directions covered.

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

Deploy Server

Other Tools