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

The annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false. The description adds that all fields come back, including custom fields, and it names the underlying endpoint GET /api/events/{id}. It says nothing, though, about what happens when the id is unknown or unsupported (an error versus an empty result) or about access permissions.

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 terse sentences with no filler: the scope plus the returned-field list comes first and the endpoint reference comes last. Every clause adds information.

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?

Because there is no output schema, the parenthetical field list usefully tells the agent what to expect from the response. With one required parameter and annotations covering the safety profile, the definition is close to complete; the only real gap is error or not-found behavior.

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?

The input schema has a description coverage of 100% with a single well-documented required integer event_id, so the baseline is 3. The description's "by id" adds no format, range or validation detail beyond what the schema already states.

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 gives a specific verb (retrieval), resource (event or task) and retrieval key (by id), and enumerates the fields returned, which clearly separates it from the group/resource getters among its siblings. It never explicitly contrasts itself with scheduleit_list_events, so it just misses the top score.

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?

"By id" implies the usage context: call this when you already hold an id that a list or create call returned. There are no explicit when/when-not rules and no mention of the alternative call scheduleit_list_events, so the guidance stays implicit.

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