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

With no annotations provided, the description carries the disclosure burden. It does a solid job: it reveals default-property behavior, that unverified properties are supported, the return values, and even the token cost. For a simple read-only lookup this is strong, though it does not cover error behavior or authentication requirements.

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?

Four short sentences, each earning its place: purpose-first, then discovery prerequisite, then parameter guidance, then return value and cost. No filler or redundancy.

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 low-complexity tool with one optional parameter and an output schema, the description covers everything needed to call it correctly: how to discover valid values, how to trigger defaults, what the response contains, and cost. No meaningful gaps remain.

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 parameter description is already clear. The tool description adds practical meaning beyond the schema: site_url should be an exact value taken from list_sites and may include unverified properties, and omitting it selects the default property. This enriches the schema rather than repeating it.

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 opens with a specific verb and resource: 'Get one Search Console property for this account.' It clearly distinguishes from list_sites by emphasizing a single property, and it states what the call returns (property URL and permission level), leaving no ambiguity about the tool's function.

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 explicitly names the sibling list_sites as a discovery prerequisite and gives precise instructions: omit site_url for the default property, or pass an exact site_url from that response, including unverified properties. It falls short of a full 5 because it doesn't explicitly state when NOT to use this tool (e.g., when you need all sites, use list_sites), though that is implied.

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