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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the underlying endpoint ('GET /event') and the shape of returned content (dates, activity, area, organiser, capacity, attendance rules), but says nothing about pagination, result ordering, or rate limits beyond what the schema states.

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 dense sentences with the purpose front-loaded and the filter inventory second; nothing is wasted. The long comma-separated filter clause is slightly list-like, but it is efficient rather than padded.

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 17-parameter read-only search tool with no output schema and full annotation coverage, the description supplies enough for an agent to understand scope and available filters. Only pagination and return-shape details are absent, and those are handled by the schema.

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% with 17 documented parameters, so the schema carries the parameter burden. The description's filter list largely restates those same parameters in prose and adds no extra syntax or semantics (e.g. how from_date/to_date combine, or how membership_id scoping works).

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 ('List or search') and resource ('events and classes'), and even disambiguates the domain by naming the subtypes (sessions, courses, tournaments). It never names a sibling tool, so the agent must infer that this is the plural/list counterpart to hello_club_get_event rather than being told.

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?

It enumerates every filter dimension available, which implicitly tells the agent this is the tool for filtered event discovery, but it offers no explicit when-to-use/when-not guidance and never points to alternatives such as hello_club_get_event for a single record or hello_club_list_event_attendees for attendance detail.

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