summary

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

Without annotations, the description carries the full burden. It clearly states the tool is read-only ('get') and lists the returned data points (table counts, total rows, etc.). It does not disclose whether data is real-time or cached, but the succinct listing of outputs is sufficient for a straightforward overview tool.

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?

The description is a single, well-structured sentence that front-loads the main purpose ('Get a quick overview of all databases') followed by specific items. Every word adds value, and it is perfectly sized for the tool's simplicity.

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?

Given zero parameters and the presence of an output schema (which likely details the return structure), the description is complete. It explains the tool's purpose and the key data it provides, leaving no ambiguity. The tool is simple, and the description covers all necessary context.

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?

The tool has zero parameters, so there is nothing to explain beyond what the schema (empty) shows. The description correctly implies no input is needed. Baseline 4 is appropriate as no additional parameter information is required.

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 uses a clear verb 'get' and specifies the resource 'overview of all databases' with concrete elements: table counts, total rows, largest tables, database sizes. It distinguishes itself from sibling tools like 'list_databases' (which likely only lists names) and 'schema' (which provides structural details).

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 'quick overview' implies a lightweight, informative tool for initial understanding. Although no explicit when-to-use or when-not-to-use guidance is provided, the context is clear due to the tool's simplicity and zero parameters. A slight deduction for not mentioning alternatives, but siblings are obvious.

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