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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds real value beyond them by disclosing what the payload actually contains (productos, precios, tono, qué no decir), which matters because there is no output schema; this effectively documents return content for an agent.

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?

A single compact sentence, front-loaded with the resource name and its content categories; there is no filler. It loses a point for being a bare noun phrase that omits the action verb, leaving the sentence slightly incomplete as a tool description.

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 one-parameter read tool, the essential content scope is stated, which partly compensates for the absent output schema. Still, the definition omits when an agent should reach for this manual and how it relates to get_brand_overview, leaving a routing gap in a very crowded sibling set.

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 the brand_id field already carries strong disambiguation guidance, including what to do when multiple brands exist. The description adds nothing about the parameter, 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?

The description defines the resource as a noun phrase ("El Manual de la marca: lo que el bot de comentarios y el de mensajes saben del negocio") and enumerates its contents (productos, precios, tono, qué no decir), which makes the content scope reasonably clear. But it never states the action of retrieving it, and it does not differentiate from the sibling get_brand_overview or its counterpart update_brand_manual.

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?

The description contains no guidance on when to fetch the brand manual versus get_brand_overview, get_draft_writing_instructions, or list_brands. The only usage hint in the whole definition lives in the brand_id schema text ("Usa solo la marca que el usuario nombró..."), not in the description itself.

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