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

With no annotations, the description carries the full burden, and it delivers meaningful behavioral context: the operation is a read of properties visible to the connected account, and the returned values come in two concrete formats (URL-prefix and sc-domain) with examples. It does not discuss auth failures, empty results, or rate limits, but for a read-only enumerator this is solid coverage.

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 sentence: verb and resource first, then the downstream consumers, then the two URL formats in a compact parenthetical. No sentence is filler; every clause adds information an agent needs to act.

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 simple one-optional-parameter enumerator with no output schema, the description supplies the two things an agent most needs: what the return values look like and where they are passed next. Nothing essential for correct invocation is missing.

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%, so the single 'account' parameter is already documented in the schema, including the multi-account case. The description adds only the phrase 'the connected Google account can read', which does not extend beyond the schema's own explanation. 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 (List) and resource (Google Search Console properties the connected account can read), and immediately clarifies the shape of the result (site URLs). It is clearly distinguishable from the sibling tools gsc_query and gsc_inspect_url, which consume its output rather than enumerate properties.

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 tells the agent what to do with the output by naming gsc_query and gsc_inspect_url as consumers, which effectively signals the entry point of the GSC workflow. It does not state an explicit when-not condition or alternative discovery tool, so it stops short of full routing guidance.

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