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Softeria

Microsoft 365 MCP Server

by Softeria

list-calendars

list-calendars
Read-only

List all calendars for a user, from the default calendar group or a specific calendar group.

Instructions

Get all the user's calendars (/calendars navigation property), get the calendars from the default calendar group or from a specific calendar group.

Input Schema

TableJSON 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().
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.
filterNoOData filter expression. Add $count=true for advanced filters (flag/flagStatus, contains()). Cannot combine with $search.
searchNoKQL search query — wrap value in double quotes. Cannot combine with $filter.
selectNoComma-separated fields to return, e.g. id,subject,from,receivedDateTime
orderbyNoSort expression, e.g. receivedDateTime desc
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
Behavior3/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the description's main behavioral contribution is noting the ability to retrieve calendars from the default or a specific group. This adds some context but does not disclose additional traits like pagination behavior or auth scope beyond what is implied.

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 description is one sentence but somewhat repetitive ('Get all the user's calendars..., get the calendars...'). It is not overly long, but could be more concise by avoiding the repeated structure.

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?

The description is brief and lacks details about the return format, typical usage patterns, or how to handle pagination. Despite the schema covering parameters, a user would benefit from knowing what information is returned per calendar (e.g., id, name, color). The tool has 11 parameters and no output schema, so more context is expected.

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%, and the description adds no information about parameters. All parameter documentation is in the schema, so the description provides no additional value for understanding parameters. Baseline 3 is appropriate.

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?

The description clearly states the tool retrieves calendars, specifying both from the default group and specific groups. It uses a specific verb ('Get') and resource ('user's calendars'), but does not explicitly differentiate from related tools like 'get-calendar' or 'list-specific-calendar-events', though the resource type is distinct.

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

Usage Guidelines2/5

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. It does not mention when to choose this over other calendar listing tools (e.g., for specific groups vs. default), nor does it provide context about prerequisites or limitations.

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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