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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the concrete endpoint (GET /v3/products/{id}) and the returned field set, but says nothing about error/not-found behavior or whether the response is a single object versus a wrapped envelope.

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?

One front-loaded clause stating what is returned plus the HTTP route — no filler, nothing an agent must scan past. The endpoint is a compact, useful addition rather than padding.

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 single-record getter with one fully documented parameter and annotations covering the safety profile, the description is nearly sufficient; enumerating the returned fields compensates for the absence of an output schema. Minor gap: no mention of not-found handling or idempotency of the lookup.

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 product_id is already documented as 'AgendaPro product id' with an integer type and positive constraint. The description's 'by id' adds no syntax, format, or sourcing guidance 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 verb and resource ('One catalog product by id') and enumerates the fields returned (description, SKU, price, category, brand, display), which lets an agent distinguish it from agendapro_list_products by singular-vs-listing scope. It stops short of naming that sibling explicitly, so it's 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?

Usage is only implied: 'by id' signals you need a known product identifier, and 'One catalog product' implies the lookup-vs-list split. There is no explicit statement of when to prefer this over agendapro_list_products, nor guidance on what to do if the id is unknown or not found.

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