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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds only that the response includes the 'full payload', which is a modest but real signal about return richness. No error/not-found behavior is mentioned.

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 short, front-loaded sentence with zero waste. It is not padded, though its brevity comes partly from under-specification rather than discipline.

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 single-param read with full annotations, the description is minimally sufficient. It omits the distinction from get-workspace-event and list-events and says nothing about behavior when the ID is unknown, which are the likely agent failure modes here.

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?

There is a single parameter with 100% schema description coverage (evt_xxx format, minLength 1), so the schema carries the semantics. The description adds nothing about the ID beyond the schema. Baseline 3 is appropriate for high coverage plus one param.

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 (retrieve) and resource (one event), which is better than restating the name. But the sibling list includes both list-events and get-workspace-event, and the description never distinguishes this tool from those. An agent can't tell from the description alone which event-lookup tool applies.

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 on when to use this versus list-events (bulk retrieval) or get-workspace-event. The one thing implied is 'one event', but no exclusions, prerequisites, or alternative routing are stated.

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