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

Annotations already establish read-only, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds genuinely useful return-content detail (Schema.org Event markup, quotable lines, days-until calculation) that compensates for the absence of an output schema.

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?

Two compact sentences, front-loading the resource definition and then the returned artifacts. No filler, though the parenthetical event list is long.

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?

With no output schema, the description usefully summarizes the response shape (Event markup, quotable lines, days-until). Combined with annotations covering the safety profile, the definition gives an agent enough to invoke it correctly, though it lacks sibling routing guidance.

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 100% and the single 'upcoming' parameter is fully documented in the schema. The description adds no additional syntax or filtering semantics beyond what the schema provides, so the baseline 3 applies.

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 resource (calendar of veteran-relevant giving events) and enumerates concrete instances (Veterans Day, GivingTuesday, year-end, etc.), making the purpose immediately clear. It does not explicitly contrast itself with giving-adjacent siblings like get_legacy_giving or get_donate_options, so it falls short of the top tier.

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 guidance on when to use this tool versus alternatives, and no prerequisites or exclusions are stated. The agent must infer usage purely from the tool name and the enumerated event list.

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