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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=true). The description adds real value beyond them: it returns an order number, requires explicit client confirmation before booking, discloses the $700 fee if the budget is rejected, and warns that the tool will prompt about recent warranty services. However, it says nothing about what happens if the slot is taken, duplicate-booking risk given idempotentHint=false, or failure modes.

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?

Front-loads purpose and return value, then numbers the three preconditions in execution order, which is easy for an agent to follow. Density is high but every clause carries operational weight; only the parenthetical fee amount is borderline extraneous.

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?

For a 16-parameter, 10-required mutation with no output schema, the description covers the critical gaps: prerequisite availability check, required client confirmation, the fee condition, and the warranty-claim branch. It still omits failure handling (slot no longer available, validation errors) and cancellation/rescheduling guidance, which matter for a non-idempotent booking 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 every parameter including enums, patterns and the conditional 'problema obligatorio en reparaciones' is already documented. The description reinforces the franja provenance (tal como lo devolvió consultar_disponibilidad) and the confirmado_por_cliente/ignorar_garantia logic, but adds little meaning the schema does not already carry—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 verb+resource (reservar la visita de un técnico al domicilio) and even the return value (número de orden), which no other sibling provides. It does not explicitly distinguish itself from agendar_reclamo, which handles the warranty-claim path it references, leaving that boundary implicit.

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 an explicit pre-call workflow: pick a free slot via consultar_disponibilidad, collect name/celular/dirección/problema, then show a summary and wait for explicit confirmation. It never states when NOT to use it (e.g., warranty claims should go to agendar_reclamo), so the exclusions are only implied.

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