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

With no annotations, the description carries the disclosure burden, and it does well by enumerating the exact fields returned (version, coverage window, entry count, sources, license MIT, attribution), signalling a static, read-only metadata lookup with no arguments and no side effects. It does not explicitly state that it performs no mutation, which is the only reason it falls short of a 5.

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?

A single front-loaded sentence that fully identifies the resource and its contents with zero filler. Every listed item (version, coverage window, entry count, sources, license, attribution) earns its place as a preview of the returned fields.

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?

There is no output schema, so the description must characterize the return value, which it does by listing the metadata fields an agent will receive. Combined with the zero-parameter schema, this is nearly complete; only an explicit statement of read-only/no-side-effect behavior is missing.

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?

The tool takes zero parameters, so the baseline is 4. The description correctly implies no input is needed, and there is nothing further to document.

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 the specific resource (dataset provenance/coverage metadata for the unlock dataset) and enumerates what it contains (version, coverage window, entry count, sources, license, attribution). This clearly separates it from the data-returning siblings get_token_unlocks, get_unlock_calendar and list_upcoming_unlocks, though the verb is only implicit ('Provenance and coverage of...').

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?

Usage is only implied: by describing itself as dataset provenance/coverage metadata, an agent can infer this is the tool to call for context about the data rather than for the unlock records themselves. There is no explicit 'use this when...' statement and no named alternative or exclusion.

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