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

Annotations already cover readOnly, idempotent, non-destructive and closed-world, so the safety profile is free. The description adds genuinely new context beyond them: the exact shape of the returned card and an explicit data-scope guarantee ('no pet, owner or medical data'), which tells the agent this call is privacy-safe and non-medical. It stops short of stating permissions or error behavior.

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 sentences, front-loaded with the trigger condition and tightly packed. The contents enumeration is long but each element disambiguates the tool from its siblings, so little is wasted; still slightly denser than necessary.

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 an output schema present the description need not explain return values, yet it does so at a useful level of abstraction, and it closes off the main misuse ('not for a single appointment'). For a one-parameter read-only tool whose annotations carry the safety profile, this is nearly complete; only permission/error expectations are unaddressed.

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?

There is a single parameter and schema description coverage is 100% (the schema itself documents the 24-char lowercase hex pattern). The description only says 'selected by its identifier', which adds no syntax or format detail beyond the schema, so the baseline of 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?

States a specific verb and resource: 'render a read-only administrative overview for one Veterical clinic'. It further enumerates what the overview contains (appointment counts, bookable staff, open slots, catalog prices), which is enough to distinguish it from get_clinic and get_clinic_schedule_summary without opening their 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 an explicit trigger ('when the user wants to render a read-only administrative overview for one clinic') and one exclusion ('Not for a single appointment'). However it does not name the obvious siblings (get_clinic, get_clinic_schedule_summary, get_clinic_availability) that an agent would otherwise weigh, so the routing guidance is clear but not exhaustive.

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