analytics_period_accounts

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so description does not need to restate. However, it adds no extra behavioral context beyond what annotations imply, such as output format or pagination.

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?

Every sentence adds value: purpose, prerequisite, usage condition, and trigger words. No redundant information.

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?

While prerequisite and trigger words are helpful, the description fails to explain the parameters or output. Given the tool's low complexity (2 params, no nested objects), the gap is moderate.

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 coverage is 0%, yet description provides no explanation of either parameter (period, paymentMethod). The agent lacks guidance on what values to provide, especially for the optional paymentMethod.

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?

Description clearly states 'Get account breakdown for a statement period' with a specific verb and resource. It distinguishes from sibling tools like analytics_range_accounts by emphasizing 'one statement period'.

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?

Explicitly provides prerequisite (call analytics_periods_list first), specifies when to use (account totals inside one period), and lists trigger words. This gives clear guidance for tool selection.

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