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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered; the description goes well beyond that by disclosing that the reported value is shared across all domains on the server, that a missing/unreadable value is reported as an explicit measurement failure rather than proof that no backup exists, and that the data comes from a turbocheck report refreshed once daily (timestamp in the response). Only the response shape/pagination is left unstated.

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?

Purpose and scope are front-loaded, and every sentence carries distinct information (scope warning, sibling routing, failure semantics, data freshness). It is on the dense side at five sentences, but none is filler and each removes a plausible agent error.

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 takes on the burden of describing returns and does so (date, status, age of the last backup), plus it explains the shared-per-server nature of the value and the failure case. An agent has everything needed to call and interpret this 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% for the single 'domain' parameter, so the schema already documents it fully. The description adds no syntax, format, or default guidance for the parameter beyond what the schema provides, making the baseline 3 appropriate.

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 (retrieves the server's nightly full-backup status: date, status, age) and immediately pins the scope by declaring it is NOT a domain-specific backup, since the value is identical for every domain on the same server. It explicitly names the sibling tools it is not (get_wordpress_backups, create_wordpress_backup), so an agent can distinguish it without opening a schema.

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?

Gives an explicit alternative and the selecting condition: for backing up or restoring a single WordPress site, get_wordpress_backups / create_wordpress_backup are the right tools, not this one. It also states the inverse usage case (server-wide backup state covering this domain), leaving nothing to inference.

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