create_calendar_event

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

No annotations are provided, so the description carries the full behavioral burden for a mutation tool. It says nothing about whether attendees receive invitations, whether conflicts are checked, how timezones are handled for the ISO datetimes, or whether the operation is idempotent — all material for a create operation that emails external parties.

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 purpose is front-loaded in a single sentence, followed by a clean Args/Returns/Example structure that is easy to scan. The example is somewhat redundant with the Args section and uses oddly specific real-looking addresses and Italian sample text, which adds noise without new information.

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?

An output schema exists, so the brief Returns note is sufficient, and parameter documentation is thorough. However, for a no-annotation mutation tool, the absence of any statement about invitations, permissions, or conflict behavior leaves meaningful gaps an agent would want before calling it.

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 0%, so the description must compensate, and it largely does: each of the six parameters is described, including required/optional status, the ISO datetime format with a concrete example, and that attendees are a comma-separated email list. The notable gap is timezone/offset semantics for start and end.

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 opening line gives a specific verb and resource ("Create a new calendar event"), which is unambiguous against siblings such as list_calendar_events, delete_calendar_event, or accept_calendar_event. It never explicitly names those siblings, but the operation is distinct enough that differentiation is effectively implied by the verb.

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?

There is no when-to-use guidance, no stated prerequisites (calendar selection, auth scopes, timezone assumptions), and no mention of which sibling to use for accepting/declining versus creating. The worked example shows how to call it but not when it is the right tool.

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