create_calendar_event

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

No annotations are provided, so the description carries full behavioral burden. It only states 'creates an event' without detailing what the operation entails—such as whether it opens the app, creates a blank event, or requires user interaction. This is insufficient for a tool with zero 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 (9 words) that is front-loaded with the key action and resource. Every word is necessary and there is no waste.

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?

Given the tool's zero parameters and no output schema, the description provides the bare minimum. It is adequate for understanding the basic purpose but lacks context about behavior (e.g., app state, confirmation), which would be valuable for complete usage.

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?

The tool has zero parameters, and the schema coverage is 100% (trivially). Per the zero-parameter baseline, a score of 4 is appropriate because no parameter description is needed, and the description does not mislead.

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 verb 'creates' and the resource 'event in the Mac's Calendar app (Calendar.app)', distinguishing it clearly from sibling tools like list_calendar_events, delete_calendar_event, and m365_create_event.

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?

The description implies usage for Mac Calendar only, but does not explicitly provide when to use this tool versus alternatives like m365_create_event. No when-not-to-use guidance is given.

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