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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds only scoping context ('online at one location', default to first location) and does not describe pagination, result caps, or auth requirements, so it merits the baseline rather than more.

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, no filler: the first defines output and scope, the second gives the downstream usage. The key information is front-loaded and nothing is redundant.

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 annotations covering safety, full schema coverage, and no output schema, the description correctly compensates by enumerating the returned fields (name, duration, price, professionals). An agent has everything needed to call it and chain it into find_slots.

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 both parameters (business, location_id) are already documented, including the default-to-first-location behavior. The description's 'at one location' phrase reinforces location_id semantics but adds no format or syntax detail beyond the schema, making the baseline 3 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?

States a specific verb (List) and resource (services a business offers) and enumerates the returned fields: name, duration, price, professionals. It also distinguishes the tool from the sibling find_slots by positioning itself as the id source for that call.

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 explicit sequencing guidance ('Use the ids with find_slots') and the schema ties 'business' to find_business output, so an agent knows where this fits in the flow. It stops short of stating when NOT to use it (e.g. when services are already cached or when searching across locations).

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