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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavior: the live-schedule source of truth and the available=false fallback payload with booking links. Return-shape detail is otherwise left to the output schema.

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, zero filler, and the core capability is front-loaded before the fallback caveat. Every clause carries information an agent needs.

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 7 optional parameters and an output schema present, the description does not need to explain return values, and it still covers the one non-obvious outcome (no availability). It omits any note on default timezone/date window behavior, which the schema only partially compensates for.

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% and every parameter (from/to, hours_from/hours_to, timezone, limit, session_type) is documented in the schema itself, so the baseline is 3. The description adds only the loose 'next days' framing, which the schema tightens to a 7-day window, and no extra syntax or default guidance.

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 concrete resource and its provenance: real free consultation slots pulled from the live booking-page schedule. That clearly separates it from content-oriented siblings like get_faq or get_services_and_pricing. It stops short of naming the adjacent action tool (prepare_booking_handoff), so it is clear but not maximally differentiated.

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 gives an explicit conditional branch: when no data is available, returns available=false with links, and the agent should send the person to the booking page. That is actionable routing guidance for a real edge case. It does not say when to prefer this over prepare_booking_handoff, so no exclusions are stated.

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