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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the UTC framing and the underlying endpoint, but does not say whether past events are excluded or how results are ordered, which are the substantive behavioral questions for an 'upcoming events' tool.

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?

One compact sentence plus the endpoint, front-loaded with the verb and resource. Nothing wasted, though the bare endpoint adds little for an agent that will not call it directly.

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?

For a simple two-parameter read tool with a fully documented schema and read-only annotations, this is nearly sufficient. The only real gap is that no output schema exists and the description says nothing about what an event record contains.

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 coverage is 100% and the schema already spells out the yyyy-mm-dd 00:00 UTC semantics and the inclusive-end-day trick. The description only restates 'between two dates (UTC)', adding nothing the schema does not already carry.

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?

States a specific verb and resource: lists waiver events within a date range, with UTC noted. It does not distinguish itself from the sibling waiverfile_list_events, so an agent cannot tell from the description alone which list tool to pick.

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 'for example the next 7 days' phrase implies a typical window, but there is no explicit guidance on when to use this versus waiverfile_list_events or whether it filters to future-only events.

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