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

Beyond the annotations, it discloses that the operation only queues a request, that its status is pending confirmation, and that nothing is sent or held automatically. These details clearly define the practical effect and prevent an agent from promising a reserved slot or completed notification.

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?

Three short sentences front-load the action and prerequisite, then state the resulting status and important non-effects. Every sentence contributes useful selection or invocation information without repetition.

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?

Together with the fully described flat input schema, output schema, and annotations, the description supplies the essential workflow, effect, and status context needed for correct invocation. No material prerequisite or behavioral limitation is left ambiguous.

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%, so the schema already documents all six parameters, including the slotId source and meetingType constraint. The description reinforces the slotId workflow but adds no substantive parameter meaning beyond those schema descriptions.

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?

“Queues an appointment request” gives a specific verb and resource, while the slotId prerequisite connects it to the list_open_slots workflow. It also distinguishes requesting an appointment from merely listing availability or obtaining a confirmed booking.

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 explicitly says to use a slotId previously returned by list_open_slots, establishing when the tool enters the workflow. The pending-confirmation and no-automatic-hold statements further prevent the agent from using or representing it as an instant booking tool.

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