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

No annotations are provided, so the description carries the full behavioral burden. It discloses the operator-only authorization requirement, which is useful, but says nothing about whether the state change is reversible, whether transitions are validated (e.g. can a closed applicant be reopened), or idempotency. The listed status values merely duplicate the schema enum.

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?

A single sentence with the access constraint front-loaded and no filler. It is appropriately sized for a two-parameter status setter, though the brevity is partly what leaves the semantic gaps noted above.

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 two-parameter, single-enum mutation with no output schema, the description is close to adequate: it covers who may call it and what statuses exist. It omits any statement about the id parameter and about state-transition rules, which a caller changing status arguably needs.

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 0%, so the description must compensate. It partially documents the status parameter by naming the three allowed values, but adds no meaning beyond the enum already in the schema, and the required 'id' parameter is never explained (which entity, and how to obtain it).

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 (mark) and the target resource (a waitlist applicant), plus the resulting states, so an agent can distinguish this from waitlist_join, waitlist_list and waitlist_delete. It stops short of saying 'update a waitlist entry's status' explicitly, but the intent is unambiguous.

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?

'Platform operators only' gives a genuine audience/auth constraint that gates use, which is more than most sibling tools offer. However, it gives no guidance on when to change status versus deleting (waitlist_delete) or listing (waitlist_list), so routing rests on inference from the name.

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