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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the useful content disclosure that results pair staff with their weekly hours and offered services, but says nothing about filtering, inactive staff, or pagination.

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 short and front-loaded, but it is a bare noun phrase rather than a sentence, and the brevity comes at the cost of a verb and any routing information. Nothing is wasted, but too little is said.

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 must convey return shape; it does name the two result dimensions (hours, services), which is helpful. However it omits whether staff identity fields, inactive staff, or empty-week behavior appear in results, so an agent still cannot fully predict the response.

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% and the week_start_date parameter already documents 'any day of the week, YYYY-MM-DD, default: this week.' The description's 'for a week' restates this without adding format or behavior detail, 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 names the resource (staff members) and the payload (working hours for a week, services offered), but it is a noun fragment with no verb and no differentiation from siblings like list_services, list_time_off, or find_open_slots. An agent can infer it enumerates staff, but must guess how it relates to the other list/find tools.

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?

There is no guidance on when to call this versus list_services (to get service definitions) or find_open_slots (to get bookable availability). The 'week' framing hints at scheduling use but never states the trigger condition or any exclusion.

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