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

Annotations already cover the safety profile (readOnlyHint=true, destructiveHint=false, openWorldHint=true), so the description only needs to add context. It does: result ordering ('oldest start time first'), the per-item ticket ID linkage, and an auth prerequisite ('Needs the user's Cotlet API key with access to this app'), which are details annotations cannot convey.

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?

Purpose and scope are front-loaded, and the sentences are largely information-bearing. It repeats the date-range idea ('for a date range' in the first and second sentences), a minor redundancy that keeps it just short of a 5.

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 carries the return-value burden and handles it by naming the returned fields, the sort order, and the reusable ticket ID. It covers what an agent needs to call the tool correctly; only the absence of pagination/volume expectations keeps it from a 5.

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 from, to, and employee_id including the 'Default: same as from' behavior. The description restates the date-range scoping and adds the 'one groomer's day' rationale for employee_id, but no format or edge-case detail beyond the schema. Baseline 3 is appropriate.

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 ('List appointments'), scopes it to a date range, and enumerates the fields returned (client, pet, services, employee, status). It also distinguishes itself from single-item siblings by naming get_appointment, update_appointment and send_pickup_text, so an agent can separate it from daySmart's other appointment tools without opening schemas.

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?

Gives a concrete usage scenario ('Filter by employee to get one groomer's day') and explains the downstream use of the returned ticket ID. It lacks an explicit when-not or a head-to-head comparison against get_appointment for the single-record case, but the context is clear enough to select the tool.

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