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

With no annotations, the description carries the full burden and does disclose key traits: it is a destructive replace (empty list removes memberships), it requires a current revision from get (concurrency control), and it explicitly excludes biography/external platform profiles. The 'immediately publicly' wording is unclear about visibility/latency, holding it below 5.

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?

Front-loaded and reasonably short, but the 'Staff save and actual add/change/delete/view_coachassociation required' segment is malformed and wastes space, and 'immediately publicly' adds ambiguity rather than value.

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 4-param mutation with no annotations and no output schema, it covers the important parts (replace semantics, revision prerequisite, confirm step, memberships shape) but leaves token and coach_id undescribed and the overall phrasing partially garbled.

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 0%, so the description must compensate. It usefully specifies the memberships structure ({association_id: existing positive integer, member_profile_url: HTTPS or empty}) and the max-40/distinct constraints, but says nothing about token or coach_id, and only hints at revision via the get reference.

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 and resource: replace one existing coach's memberships, distinguishing it from the get sibling by the 'ONLY one existing coach' scope. The phrase 'immediately publicly' is confusing but the core operation is identifiable.

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?

Provides real routing guidance: 'Current revision from get mandatory' points to the get sibling as a prerequisite, and 'Confirm first' flags the confirmation step. The 'Staff save and actual add/change/delete/view_coachassociation required' clause is garbled but signals permission requirements.

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