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

With no annotations, the description carries the behavioral burden and does disclose that the range is inclusive and that omitted bounds are open-ended. However, it does not cover return format, ordering, pagination, or what happens when both bounds are omitted, leaving meaningful behavioral gaps for a query 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 two tight sentences with the core operation front-loaded and no wasted text. The range semantics are stated efficiently in the second sentence.

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?

The definition is adequate for a simple two-parameter read query, but with no output schema and no annotations, it leaves return shape and key behavioral details implicit. It also does not relate the tool to its siblings, which matters given list_upcoming_unlocks and get_token_unlocks overlap in domain.

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 already 100%, so the baseline is 3, but the description adds useful semantics: the range is inclusive, both dates are ISO YYYY-MM-DD, and omitting a bound leaves that side open. This meaningfully clarifies the optional start_date and end_date parameters beyond the schema descriptions.

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 states a specific verb and resource: "Return all unlock events" filtered by a date range. It is clear what the tool does, though it does not explicitly differentiate itself from siblings like list_upcoming_unlocks or get_token_unlocks.

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 only usage-like guidance is "Omit a bound to leave that side open," which explains parameter behavior rather than when to choose this tool over alternatives. No sibling tools are referenced and no when/when-not conditions are given.

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