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

With no annotations provided, the description carries the full burden; it usefully discloses the free-tier exclusion, the sort order, and the currency/cents unit. However, it omits pagination behavior, whether results are truncated by the default limit of 25, and any permission requirements.

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?

Four short sentences, front-loaded with the core action and scope. 'Newest first, ordered by payment date' is mildly redundant but the description contains little waste overall.

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?

For a read-only list tool with no annotations and no output schema, the description covers scope, ordering, and units, which is a reasonable baseline. It is still incomplete on include_samples semantics and limit/result-window behavior, which an agent needs to call it 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 0%, so the description must compensate, but it only explains the meaning of app_id scoping. The limit parameter (default 25) and the include_samples flag are never mentioned, leaving two of three parameters semantically undocumented.

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 ('List recent paid transactions') plus the defining scope ('excludes free-tier rows') and ordering ('newest first, ordered by payment date'). This clearly separates it from siblings like list_recent_cancellations and revenue_summary without opening the 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?

'Use to review recent sales activity' implies a use case but names no alternatives or when-not conditions. Given siblings such as revenue_by_app and revenue_summary, an agent gets no explicit routing guidance between them.

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