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

With no annotations, the description carries the burden, and it does disclose two helpful behaviors: recurring events are expanded into occurrences and the default window is the next 7 days on the default calendar. It omits ordering, pagination, timezone handling, and return shape, but these are secondary for a list tool.

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

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

Three short sentences, each earning its place: core action, recurrence behavior, and defaults. No filler or redundant restatement of the title.

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

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

The fully described schema and concise behavioral notes are mostly adequate for a simple list operation. However, the lack of routing guidance relative to search_outlook_calendar_events and the absence of any mention of result shape or limits leaves a moderate completeness gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and each parameter already has a useful description, including defaults for timeMin, timeMax, and calendarId as well as mailbox guidance. The description reinforces the time-window concept but adds no meaning beyond the schema.

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

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

The description uses a specific verb+resource construction: 'List events in a time window,' and adds meaningful scope details such as recurrence expansion and a 7-day default. It is clearly distinct from get_outlook_calendar_event, but it does not explicitly differentiate from the closely related search_outlook_calendar_events.

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

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

No when-to-use or when-not-to-use guidance is provided, and no sibling alternative is mentioned. The defaults signal a typical use case, but the agent is left to infer when to choose this tool over search_outlook_calendar_events.

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