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Softeria

Microsoft 365 MCP Server

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TypeScript
Hybrid

list-supported-languages

list-supported-languages
Read-only

Get the list of locales and languages that are supported for the user, as configured on the user's mailbox server. When setting up an Outlook client, the user selects the preferred language from this supported list.

Instructions

Get the list of locales and languages that are supported for the user, as configured on the user's mailbox server. When setting up an Outlook client, the user selects the preferred language from this supported list. You can subsequently get the preferred language by getting the user's mailbox settings.

đź’ˇ TIP: Lists locales and languages the user's mailbox server supports for the Outlook UI and message rendering. Returns localeInfo objects with locale (e.g. 'en-US') and displayName ('English (United States)'). Use this to validate the locale value before calling update-mailbox-settings to change the user's preferred language.

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

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 changedv0.131.2
    • changedInput schema / additionalProperties
      Previous value: -falseNew value: +true
  6. Addedv0.114.0
  7. Removedv0.112.2
  8. Addedv0.110.0
  9. Removedv0.108.0
  10. Addedv0.105.0

TDQS

A4.2/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false, so the safety profile is covered. The description adds real value beyond that: it discloses the return shape ('localeInfo objects with locale (e.g. 'en-US') and displayName'), which is important given there is no output schema, and explains the mailbox-server origin of the data.

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?

Purpose is front-loaded, but the first paragraph and the TIP restate the same core fact ('list of locales and languages supported for the user' vs 'lists locales and languages the user's mailbox server supports'), which is redundant. The TIP's return-format and routing details earn their place, but the duplication costs conciseness.

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?

With no output schema, the description compensates by describing the returned localeInfo objects. All nine parameters are covered by the schema, and the tool's read-only, validation-oriented role is clear. The only gap is that pagination behavior of the returned list is left entirely to the schema.

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 the nine pagination/filter/query parameters are fully documented in the schema itself. The description adds no parameter-level meaning beyond that, so the baseline of 3 applies.

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 ('Get the list of') and resource ('locales and languages that are supported for the user'), plus the scoping detail that the list is 'as configured on the user's mailbox server.' An agent can distinguish it from the sibling list-supported-time-zones 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?

Explicitly routes usage: 'Use this to validate the locale value before calling update-mailbox-settings to change the user's preferred language,' and notes the preferred language can be read via get-mailbox-settings. Both the alternative and the condition that selects it are named.

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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