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

Annotations already mark this as a safe read (readOnlyHint=true, destructiveHint=false, openWorldHint=true). The description adds the endpoint and lists the returned fields, which is useful because there is no output schema, but it omits auth needs, error behavior, and any caveats for a missing event.

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 compact sentence front-loads the resource/cardinality and then lists the payload, followed by the HTTP endpoint. There is no filler and every clause contributes.

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 one-parameter read tool with annotations and no output schema, listing the returned fields and endpoint is largely sufficient. It could mention not-found behavior or auth, but nothing essential for correct invocation is missing.

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 coverage is 100% and the single event_id parameter is fully documented in the schema, including how to obtain it. The description adds only "by id" and therefore meets the baseline without adding parameter syntax or format detail.

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 retrieval action ("One event by id") and enumerates the event data returned, so the agent knows this is a single-record fetch rather than a list. It does not explicitly contrast with sibling hello_club_list_events, but the resource and cardinality are clear.

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?

The description implies use when an event id is known but gives no explicit when-to-use guidance, prerequisites, or alternatives. The schema's event_id note mentions hello_club_list_events, but the description itself does not route the agent.

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