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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds the provider-scoped, date-range-bounded nature of the read, but says nothing about pagination, result ordering, or what happens when the date range is huge.

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 tight sentence with the key scope constraints front-loaded and no filler. It is efficient, though it is so short that nothing beyond the core scope is conveyed.

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?

No output schema exists, so the description should compensate for return-value and pagination behavior, and it does not. For a 5-parameter read tool with a prerequisite provider lookup, the definition leaves the agent guessing about results and ordering.

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 high (80%), so the schema already documents calendar, from, to and calendarId. The description only restates the provider and date-range semantics, adding no format or defaulting detail beyond what the schema provides; the undocumented timeZone parameter is untouched by the description.

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 ('List events from the user's calendar'), plus the provider scope and date-range constraint. It implicitly separates itself from connection-event siblings by saying 'user's calendar', but never names an alternative tool such as list_connection_events or get_calendar_event.

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?

Usage is only implied by the phrase 'of one provider ... in a date range'. There is no explicit when-to-use vs. when-not, no mention that list_calendars must be called first to obtain a valid provider id, and no routing to get_calendar_event for a single event.

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