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

Annotations already establish read-only, idempotent, non-destructive, closed-world behavior. The description adds useful context beyond that: scope is the signed-in account, default output is visible properties only, and coverage fields are included. It does not discuss pagination or output limits, which keeps it from a 5.

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 description is front-loaded with purpose and usage and lists return fields efficiently. The closing bilingual fragment "/ Propriedades da conta com cobertura de dados." does not add actionable information for an English-speaking agent and slightly dilutes conciseness.

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?

There is no output schema, so the description appropriately explains what the tool returns: property identifiers, URLs, names, tags, branded terms, mapping status, and data coverage. Combined with annotations and the fully described single parameter, an agent has enough information to call it correctly.

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 single parameter includeHidden is documented in the schema. The description adds meaning by clarifying the default: "Default: visible properties only." That is useful beyond the schema, though only one parameter is involved.

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 uses a specific verb and resource: it lists Search Console properties synced for the signed-in account. It also enumerates the returned fields (id, siteUrl, displayName, tags, branded_terms, GA4/Bing mapping, coverage), making the tool easily distinguishable from siblings like list_ga4_properties and list_sitemaps.

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 clear usage context: "Use it first when you do not know the exact name of a site or need the date range available." It also states the default behavior (visible properties only). It does not explicitly name alternative tools or when-not-to-use cases, so it falls short of a 5.

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