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

The annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is fully covered without the description. The description only adds the "household" scope, which is mild value; it does not say whether the range is inclusive, what event types are returned, or what an empty result means.

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?

A single front-loaded sentence with no filler, hedges, or repetition. Nothing in it could be removed without losing meaning.

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 two-parameter, all-optional read with full schema coverage and complete annotations, this is nearly sufficient — an agent can call it correctly after reading the schema. The remaining gap is disambiguation: "calendar events" is never defined against meal events or external calendars, which openWorldHint hints at.

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 schema already spells out the ISO format and the 14-day / today defaulting behavior for both parameters. The phrase "between two dates" adds no format or boundary detail beyond what the schema provides, so the baseline 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?

The description names a specific verb ("Read") and a specific resource ("the household's calendar events") with an explicit scope ("between two dates"). It is clear enough to act on, but it does not distinguish this from siblings like get_meal_events or get_day, which an agent could plausibly confuse for the same request.

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 or when-not-to-use guidance and no alternative tool is named. The date-range framing implies a range query, but nothing tells an agent why it would pick this over get_meal_events or get_day for a single-day look-up.

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