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

readOnlyHint=true already tells the agent this is a safe read. The description adds useful context by naming the fields returned and citing the backing endpoint (GET /appointments/{id}), but it says nothing about behavior for a missing/invalid id, error handling, or auth requirements, so it goes only modestly beyond the annotations.

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 dense sentence with the core operation and return scope front-loaded, followed by an endpoint citation. Nothing is padded, though the trailing API-path reference is slightly more for implementers than for tool selection.

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?

With no output schema, the description compensates well by enumerating the returned fields (client, practitioner, status, price, telehealth link, cancellation details). It does not describe response shape or error cases, but for a simple one-parameter read it is nearly sufficient.

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?

There is a single parameter documented at 100% schema coverage, so the schema already carries the semantics of appointment_id. The description adds no format, source, or constraint detail beyond it, which is the expected baseline for a fully documented single-param schema.

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 (fetch) and resource (one appointment), then enumerates the returned facets, which clearly distinguishes it from intakeq_list_appointments. An agent can identify the operation without opening the schema.

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: it is evident this is the single-record counterpart to intakeq_list_appointments, but the description never says when to prefer it over the list tool or over related single-item tools like intakeq_get_invoice. No prerequisites or exclusions are stated.

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