list-supported-time-zones
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 Window...
This record as markdown: /tools/jo3zik-ms-365-mcp-server/list-supported-time-zones.md
What list-supported-time-zones does on Ms 365
AI agents call list-supported-time-zones to retrieve information from Ms 365 without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
top | number | — | Page 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 |
skip | number | — | Items to skip for pagination. Not supported with $search. |
count | boolean | — | Set true to enable advanced query mode (ConsistencyLevel: eventual). Required for complex $filter on flag/flagStatus or contains(). |
filter | string | — | OData filter expression. Add $count=true for advanced filters (flag/flagStatus, contains()). Cannot combine with $search. |
search | string | — | KQL search query — wrap value in double quotes. Cannot combine with $filter. |
fetchAllPages | boolean | — | 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 sma |
includeHeaders | boolean | — | Include response headers (including ETag) in the response metadata |
excludeResponse | boolean | — | Exclude the full response body and only return success or failure indication |
TimeZoneStandard | string | Yes | Value for the 'TimeZoneStandard' path segment. |
Parameters from the server's own tool schema.
Why list-supported-time-zones is rated Low
Even though list-supported-time-zones only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs list-supported-time-zones safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Ms 365, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list-supported-time-zones, this is the rule to start with:
list-supported-time-zones is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Ms 365, apply this rule, and every list-supported-time-zones call is checked against it from then on.
Questions about list-supported-time-zones
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 — the format must match what the server expects. It is categorised as a Read tool in the Ms 365 MCP Server, which means it retrieves data without modifying state.
list-supported-time-zones accepts 9 parameters: top, skip, count, filter, search, fetchAllPages, includeHeaders, excludeResponse, TimeZoneStandard. Required: TimeZoneStandard. The full parameter table on this page comes from the server's own tool schema.
Register the Ms 365 MCP server in PolicyLayer and add a rule for list-supported-time-zones: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Ms 365. Nothing to install.
list-supported-time-zones is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list-supported-time-zones rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list-supported-time-zones. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list-supported-time-zones is provided by the Ms 365 MCP server (@jo3zik/ms-365-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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