update_event

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

The description only indicates mutation ('Update') but does not disclose side effects, required permissions, or what happens with overlapping updates. Given no annotations, the description carries the full burden and falls short.

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?

While the description is very short, it sacrifices essential information. It is under-specified rather than concise, failing to earn its place by being unhelpful.

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 the existence of an output schema, the description does not hint at the return structure, and the parameter is opaque. For a tool that updates calendar events, this is severely incomplete.

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 only parameter 'kwargs' has no description, no properties defined in the schema, and the description adds no meaning. With 0% schema description coverage, the agent has no clue what to pass.

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 action ('Update') and the resource ('a calendar event'), which is distinct from sibling tools like 'create_event' and 'delete_event'. It is specific and informative.

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 'respond_to_invite' or under what circumstances updating is appropriate. There is no mention of prerequisites or limitations.

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