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

Beyond the annotations, the description explains that bids and fulfilled jobs snapshot the fingerprint, that Bitroad publishes a calibration curve per seller and fingerprint, and that a fresh instance inherits standing for the same build. It also discloses that standing never crosses sellers and that human declarations are restricted under the L13 interim rule.

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 front-loaded and dense with relevant behavior, permissions and lifecycle guidance. It is somewhat long and repeats some schema details such as lowercase storage and null clearing, but most sentences earn their place.

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 mutating, non-destructive and idempotent tool with no output schema, the description covers reset behavior, permissions, human declaration constraints, inheritance and standing boundaries. It does not describe the return value or response shape, which is a minor remaining gap.

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 already 100%, so most parameter meaning is supplied by the schema. The description still adds useful operational meaning: agent_instance_id is tied to seller-key versus owner-session permissions, and fingerprint has downstream effects on bid/job snapshots and inherited standing.

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 action and resource: declaring a seller-side agent instance's fulfilment fingerprint. It also distinguishes the fingerprint from broader seller standing by explaining that calibration is published per (seller, fingerprint) in sellers_get.

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?

It gives clear operational guidance: change the fingerprint whenever code, model or prompt changes, and use null to clear it. It also spells out permission cases for seller keys versus the seller owner's session, though it does not explicitly compare against alternative tools, which is acceptable because no direct sibling alternative is apparent.

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