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

Annotations already declare readOnlyHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description adds genuinely new context beyond that: prices are in the business currency and the call requires a Cotlet API key with access to this app, which is useful auth information.

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?

It is front-loaded with the purpose, followed by return shape, integration guidance and auth requirement. Each sentence carries distinct information, though the leading "Fresha: Your service menu..." phrase is slightly redundant with the title.

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 steps in to describe the return shape (menu grouped by category, with duration and price per service) and the currency of prices. Combined with the integration and auth notes, an agent has everything needed to call and consume this tool.

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 location_id filter and its default are already fully documented in the schema. The description adds nothing further about parameter syntax or semantics, so the baseline 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?

The description states a specific verb+resource ("Your service menu") and enriches it with what it contains (categories, durations, prices) and how it is grouped. It is clearly distinguishable from Fresha siblings like create_appointment and find_available_slots, which it references by name.

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 explains the downstream relationship to other tools ("Use service_id from an item in find_available_slots and create_appointment"), giving clear workflow context. It does not, however, state any explicit when-not or exclusion conditions, so it stops short of full routing guidance.

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