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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is fully covered by structured data. The description adds that the returned data is the *public* catalog (a scoping fact) but says nothing about return format, pagination, or localization. Moderate added value against an already-complete annotation set.

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?

The purpose is front-loaded, but the first sentence is an overlong run-on enumeration of catalog sections that reads as keyword stuffing. It is defensible for retrieval matching, yet a list of sections would be tighter and easier to scan.

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 one optional parameter, no output schema, and rich annotations, the description is largely sufficient – it even enumerates the catalog contents, partially substituting for a missing output schema. It could still state whether results are exhaustive or paginated.

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 enum values are already self-documenting. The description only adds 'Optionally filter by category,' which is essentially a restatement of the schema's default 'all' behavior. Baseline 3 is correct when the schema does the heavy lifting.

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 and resource ('Returns Filipe Santos Fotografia's public catalog with prices') and enumerates the exact catalog domains it covers. This makes it instantly separable from transactional siblings like request_quote, buy_gift_voucher, or check_event_date.

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 trigger conditions: 'Use when the user asks what the studio offers, how much something costs, or how booking works.' Clear usage context, but it never names the alternative (e.g. request_quote) for users who want an actual binding price quote rather than the public catalog.

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