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

Annotations already declare destructiveHint=true, openWorldHint=true, and idempotentHint=false, so safety signals are covered. The description adds meaningful workflow context: the change 'waits for the owner's approval.' It does not explain whether the old slot is immediately released, what happens on rejection, or how approval status is returned.

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 description is a single efficient sentence with no filler, and the core action plus the approval caveat are front-loaded.

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 destructive mutation with no output schema, the description covers the main action and approval wait but leaves important invocation details unclear, such as what a pending approval response looks like and whether the change is immediate or conditional. It is adequate given the rich schema and annotations, but not fully complete.

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 appointment_id, start, staff_id, and notify_client in detail. The description only echoes the high-level new-start and optional-staff semantics, adding little beyond the already-complete 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?

The description gives a specific verb+resource: moving an appointment to a new start time, optionally changing staff. This clearly distinguishes it from sibling tools such as create_appointment, cancel_appointment, and get_appointment without needing to name them.

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 implies usage through 'optionally to another staff member' and approval behavior, but does not explicitly say when to choose this over cancel+create or when rescheduling is inappropriate. The agent can infer the context but is not given clear alternatives or exclusions.

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