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

Substantial disclosure beyond the annotations: it warns that the client receives an Appointment Changed message on every update, that inactive-employee assignments are blocked, that per-call confirmation is on by default but toggleable, and that the action reaches other people so each call needs user confirmation. Annotations only supply the generic write/open-world profile.

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?

The core purpose is front-loaded, but the client-notification point is stated twice ('sends the client an Appointment Changed message' and 'sends Appointment Changed on every update, even a small one'), which is redundant. The confirmation and API-key sentences are on topic but make the block longer than needed.

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 a mutation tool with no output schema and no annotations covering side effects, this is complete: it covers the edit scope, the outbound client notification, a blocking precondition, confirmation behavior, and auth requirements. An agent has everything needed to invoke it safely.

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 appointment_id and fields are already documented. The description's mention of the changeable fields mirrors the schema's fields description rather than adding syntax, format, or constraint detail, so the 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?

The description states a specific verb and resource — change appointment fields — and enumerates exactly which fields (date, time, duration, employee, price, notes) are editable. It is clearly distinguishable from daysmart_book_appointment and daysmart_void_appointment by implication, though it does not name those siblings explicitly.

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?

It gives clear context for when to use it (editing fields under Appt Details) plus prerequisites: an inactive employee blocks the edit, and the user's Cotlet API key with app access is required. It stops short of naming an alternative tool for cases that shouldn't use this one.

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