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

With no annotations provided, the description must fully disclose behavioral traits. It mentions 'safe pagination' but lacks details on permissions, performance impact, concurrency, or error handling. The read nature is clear, but side effects and limitations are not addressed.

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, front-loaded sentence with 16 words, conveying the core purpose efficiently. It earns high marks for conciseness, though it could benefit from a brief second sentence on parameter guidance without sacrificing brevity.

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 the tool's complexity (7 parameters, no annotations, no output schema, many siblings), the description is insufficient for correct selection and invocation. It lacks parameter roles, return format, error conditions, and comparative context with sibling tools.

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 0%, so the description should compensate by explaining key parameters. It only hints at 'timeColumn' and pagination (pageSize, page) but does not describe any of the 7 parameters explicitly. Users cannot map description to schema 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?

The description clearly states the tool reads recent rows from a table using a time column, specifying the action and resource. It differentiates from siblings like ob_sample_rows (random) and ob_query (general query), but could be more precise about what defines 'recent'.

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 implies usage for retrieving recent rows with a time column but provides no explicit guidance on when to use this tool over alternatives like ob_sample_rows or ob_query. No exclusions or when-not-to-use scenarios are mentioned.

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