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

Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false, so safety is covered. The description still adds value by naming the concrete data returned (status, start/end, duration, assigned users and items) and the backing endpoint. It says nothing about error behavior (e.g. invalid/unknown id) or whether unexpanded relations are omitted.

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?

Two compact fragments, return content front-loaded before the endpoint reference. No filler sentences and nothing repeated from the schema or annotations.

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?

There is no output schema, and the description compensates by summarizing the returned fields for the single-resource read. With annotations carrying the safety profile and the schema fully documenting both parameters, nothing an agent needs to call this correctly is missing.

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% and the 'include' property already documents allowed relation values and unknown-value behavior, so the schema does the heavy lifting. The description adds no meaning beyond the schema for either appointment_id or include; baseline 3 applies.

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?

Specific verb (get) plus resource (appointment) and singular scope ('One appointment by id'), with an explicit field list and the underlying endpoint GET /appointments/{id}. This implicitly separates it from aryeo_list_appointments, though the sibling is never named.

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: fetch a single appointment when you have its id. There is no explicit statement of when to prefer this over aryeo_list_appointments, and no guidance on when expansion via 'include' is worthwhile versus a plain fetch.

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