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

Annotations already declare readOnly, non-destructive, closed-world behavior, so the safety profile is covered. The description adds useful context beyond that by stating the result payload (price, length, description) and asserting completeness ('every bookable'), which matters since there is no output schema; minor gaps remain on pagination/ordering.

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 front-loaded sentence with no filler; the parenthetical examples earn their place by disambiguating what a 'session' is.

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 one-optional-param list tool with no output schema, disclosing the returned fields and the catalog scope is close to sufficient. The missing piece is any acknowledgment that results can be narrowed via the `kind` filter.

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% and the single `kind` parameter has an enum with its own description, so the schema does the work. The description adds no meaning beyond it — it never mentions the class/session/all filter, so baseline 3 applies.

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?

Names a specific verb and resource ('Lists every bookable NOGA live class and private session') and clarifies scope with examples (readings, mentorship). It implicitly separates itself from schedule-oriented siblings like get_class_schedule and get_session_times, but never names them, so differentiation is inferential rather than explicit.

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: 'bookable' suggests this is the catalog-discovery step before book_class or book_session, but the description never states when to use this instead of get_class_schedule/get_session_times. No exclusions or prerequisites are given.

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