create_calendar_event

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

With no annotations, the description carries the full burden of behavioral disclosure. It only states the action and prerequisite, but omits any details about response format, error behavior, idempotency, or side effects. For a state-changing write operation, this is a significant gap.

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 two concise sentences, each earning its place. The first states the purpose, the second gives a critical usage hint. There is zero fluff or redundancy, making it highly efficient.

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 12 parameters and no output schema, the description only covers the basic create action and a prerequisite. It does not explain what the response will look like, timezone handling, or any edge cases. For a complex tool with rich schema, this level of description is insufficient for an agent to fully anticipate outcomes.

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 input schema has 100% coverage with detailed descriptions for every parameter, so the baseline is 3. The description adds no parameter-specific information beyond what the schema already provides, but it also doesn't need to since the schema is thorough.

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 states 'Create a new calendar event,' which uses a specific verb and resource, clearly distinguishing it from sibling tools like update_calendar_event and delete_calendar_event. The purpose is unambiguous and immediately actionable.

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 provides a concrete usage guideline: 'Use list_calendars first to get calendar IDs.' This tells the agent a necessary prerequisite and hints at the workflow. However, it does not explicitly exclude use cases or compare with alternatives, but that is largely implied by the tool's name and purpose.

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