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

Annotations only declare readOnlyHint=true, so the description usefully adds that results are paginated, that passwords are redacted, and that Civo resources are region-scoped. It does not cover rate limits or auth requirements, but the added context is meaningful beyond the annotation.

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?

Two compact sentences plus an API reference line, all front-loaded with the resource and scope before the pagination and redaction details. No filler.

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 the return payload, and it does list the key database attributes and the pagination envelope plus the redaction behavior. It stops short of noting result ordering or empty-result behavior, but is largely complete for a read-only list tool.

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 all three parameters are already documented in the schema. The description restates pagination via the {page, per_page, pages, items} shape but adds no new syntax or constraint meaning for page/per_page/region, so the 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 (managed databases), names the supported engines (MySQL, PostgreSQL), and enumerates the returned attributes (version, size, nodes, IPs, port, network, firewall, status). No sibling tool covers databases, so the agent can place it immediately in the catalog.

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 phrase 'in a region' implies regional scoping, but there is no explicit when-to-use/when-not guidance or pointer to an alternative (there is no sibling database tool to route to). Usage is inferable from the name and the region mention rather than stated.

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