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

Annotations already indicate readOnlyHint=false and destructiveHint=false, which align with the create behavior. However, the description adds no extra behavioral context such as whether invites are sent, timezone defaults, or account requirements, offering minimal value beyond the annotations.

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?

The description is a single concise sentence with no wasted words, but it essentially paraphrases the tool's title with the added context of 'Microsoft 365 / Outlook calendar'. It is efficient but not especially informative.

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?

Despite having an output schema and full param coverage, the description is too sparse for a tool with 8 parameters and several closely related siblings. It lacks usage guidance and behavioral details, leaving the agent without enough context to confidently select or invoke the tool.

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 description coverage is 100%, so all parameters are documented in the schema. The description itself adds no parameter-specific insights, which falls in line with the baseline of 3 for full schema coverage.

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 clearly states the tool creates a calendar event in the Microsoft 365/Outlook calendar, using a specific verb and resource. However, it does not differentiate from the similarly named sibling 'create_calendar_event', so it lacks sibling distinction.

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 guidance is provided on when to use this tool versus alternatives like 'create_calendar_event' or other calendar tools. There are no prerequisites, exclusions, or contextual cues to help the agent decide.

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