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

Annotations already declare readOnlyHint=true and openWorldHint=true, and the description adds worthwhile context beyond them: pagination is disclosed, the 366-day window cap is a real operational constraint, and the underlying Gingr endpoint is POST despite the read-only hint, which pre-empts confusion. It stops short of describing result contents or total-count behavior.

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?

Three compact sentences with zero filler, ordered purpose → constraint/paging → backing endpoint. Every clause earns its place and the differentiating scope detail is front-loaded.

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 paged list tool with no output schema, the definition covers the essential calling contract: bounded date range, paging via the schema's next_offset hint, and the 366-day rule. Only the shape of returned owner records is left unspecified, which is a minor gap for a list endpoint.

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 3 is the baseline, but the description adds a genuine semantic constraint the schema omits: the 366-day maximum span between start_date and end_date. That cross-parameter rule is exactly the kind of meaning the schema cannot express and materially affects correct invocation.

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?

Specific verb+resource with a precise scope qualifier: owners 'created or modified between two dates (at most 366 days apart)'. This clearly separates it from the broader gingr_list_owners, though it never names that sibling explicitly. An agent can infer the delta-listing purpose from the filter semantics alone.

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 'at most 366 days apart' constraint and 'created or modified' framing imply the intended use case (delta/sync listing over a bounded window), but there is no explicit when-to-use statement, no exclusion of the sibling gingr_list_owners, and no guidance on which to pick for a full listing. Usage is implied rather than stated.

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