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

With no annotations, the description carries the burden of behavioral disclosure. It states what data is returned, including the useful distinction of 'current owner,' but does not mention whether the operation is read-only, how errors are handled, or any other behavioral caveats. This is adequate but not thorough.

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 one efficient sentence with the key point front-loaded: traits plus current owner. The colon-separated field list adds concrete detail without verbosity. No redundant or filler wording is present.

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 simple one-parameter lookup with no output schema, the description enumerates the return fields, which is the critical missing information. Minor gaps such as the exact representation of the owner or behavior for nonexistent ids remain, but they are not severe for this tool's complexity.

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%: the sole 'id' parameter is already documented as the token id with a range hint for the genesis. The description adds only that the token is a 'KOINE token,' which is marginal and does not meaningfully extend the schema's parameter documentation.

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 clearly identifies the resource ('one KOINE token') and the data returned: traits and current owner, with specific fields listed. It does not use a verb like 'retrieve' and does not explicitly differentiate from siblings such as koine_provenance, so it falls short of a 5.

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 scope 'one KOINE token' and the phrase 'current owner' imply when the tool is appropriate: for a single token's current state rather than lists or provenance. However, it does not explicitly state when to use it over alternatives or when not to use it, so usage guidance is only implied.

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