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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description confirms this is a GET and clarifies that 'availability' here means working hours per resource, adding some interpretive value, but it says nothing about pagination, timezone handling for the date, or what happens when date is omitted beyond the schema default.

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 tight sentences that front-load the purpose and meaning, with the example clarifying the ambiguous term 'availability'. The trailing endpoint path is mild redundancy but harmless.

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?

There is no output schema, so the description should carry more of the return-shape burden; it conveys the concept but not the structure (per-resource entries, time ranges, whether all resources are returned when resource_ids is omitted). Adequate but with clear gaps for a read tool whose callers must parse the result.

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 all three parameters (date, location_id, resource_ids) are already documented in the schema. The description adds no format, default, or filtering nuance beyond that, 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?

States a specific resource (a location's resources) and the exact data returned (working hours/availability on a date), with a concrete example ('who is working today'). It is clear and specific, but does not explicitly differentiate itself from siblings like first_available_slots or list_booking_slots, which also surface time-based availability.

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?

Usage is only implied: an agent can infer this is for checking staff/resource working hours, but the description never states when to pick this over first_available_slots or list_booking_slots, nor any prerequisites. No exclusions or alternatives are named.

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