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

Annotations already cover the read-only, idempotent, non-destructive profile, so the bar is lower. The description adds real behavioral content: that link_expires_at is ISO or null, that link_status is derived, and that allowlist names who can view a private site. It omits auth/permission needs, but the annotation coverage makes that a minor gap.

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?

Front-loaded with the core action, but the remainder is one long run-on sentence enumerating roughly a dozen return fields, some with parenthetical explanation. Since there is no output schema the enumeration has value, but the wall-of-text structure makes it hard to scan.

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?

With no output schema, the description carries the burden of describing returns and does so fairly thoroughly for this read tool. Combined with 100% schema coverage on inputs and annotations covering safety, an agent has nearly everything needed 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 both parameters are documented in the schema, so baseline is 3. The description adds only 'by id', which the schema already conveys via site_id; it adds no syntax or format detail beyond the structured fields.

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 ('Get a single site's ...') and scopes it to one site, which distinguishes it from list_sites. It does not explicitly name sibling tools like get_site_content or list_versions, so the differentiation is only implicit.

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?

No explicit when-to-use, prerequisites, or alternatives are stated. The enumerated return fields imply the tool is for inspecting a site's status/visibility/metadata, which is enough to infer usage but not to route confidently away from get_site_content or list_sites.

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