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

Annotations only provide destructiveHint=true; the description goes further by stating that all fields are required by IntakeQ, that Status must be Confirmed or WaitingConfirmation, and that SendClientEmailNotification is gated on Status=Confirmed. It does not describe failure modes or the response shape, but adds meaningful constraint context beyond the annotation.

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?

Four short sentences, front-loaded with the core action and then prerequisites, constraints, and endpoint in order of decreasing importance. No filler or restatement of the tool name.

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 an 8-required-parameter mutation tool with no output schema, the description covers prerequisites, enum constraints, and the conditional field. It could say more about what a successful booking returns or side effects (e.g., client notification behavior), but it is close to complete for correct invocation.

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 100%, so the baseline is 3, but the description adds cross-field semantics (the Status/SendClientEmailNotification dependency) and points to the source tool for three of the IDs. That provenance guidance is genuinely useful information the schema does not carry.

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 ('Book an appointment in the PracticeQ scheduler'), which cleanly separates it from siblings like intakeq_cancel_appointment and intakeq_update_appointment. The added endpoint reference (POST /appointments) reinforces exactly what operation is performed.

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?

Explicitly routes the agent to intakeq_get_booking_settings to obtain PractitionerId, ServiceId and LocationId before calling, and states the conditional rule for SendClientEmailNotification. It lacks an explicit 'do not use when' clause, but the context is otherwise unambiguous.

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