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

With no annotations provided, the description carries the burden of behavioral disclosure. It adds a meaningful side-effect: the clinic may call the client for confirmation. However, it does not disclose other behavioral traits such as whether the booking is final, how slots are locked, or what happens on failure.

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 compact: one purpose sentence and one mandatory-instruction sentence, both front-loaded with the key information. There is no fluff or irrelevant detail.

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?

Given high schema coverage and no output schema, the description provides the essential preconditions and side-effects needed to call the tool correctly. It could be more complete by describing the expected response or post-booking behavior, but the available information is sufficient for a straightforward booking action.

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%, so the baseline is 3. The description adds extra semantic value for the phone parameter by requiring it to be real and reachable, and it lists the fields required in the confirmation summary. These details go beyond the schema descriptions.

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 clearly states the action and resource: 'Записать клиента на приём в клинику БиоВет' — booking a client for a visit at a specific clinic. It is distinct from sibling tools by its booking intent, though it does not explicitly contrast itself with check_slots or find_clinic.

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?

The description gives explicit pre-call instructions: show the summary and obtain explicit confirmation before invoking the tool. It also requires a real phone number because the clinic may call. It does not explicitly mention when not to use the tool or name alternative tools, but the context and prerequisites are clear.

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