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

Annotations already indicate readOnlyHint=false and destructiveHint=false, meaning the tool modifies state but is not destructive. The description adds behavioral context by stating the payload is validated against a fulfillment type schema, which implies structured input and potential rejection. It does not contradict annotations.

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 sentences, concise and front-loaded. Every sentence adds value without redundancy.

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?

Given no output schema, the description could mention return values or confirmation. However, for a submission tool with good schema and annotations, the description is complete enough to guide an agent effectively.

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 100%, so parameters are well-documented in the schema. The description adds meaning beyond the schema by specifying that fulfillmentData is validated against a schema, and that the payload includes 'credentials, URLs, access info, etc.'

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 specifies the action ('submit structured fulfillment details'), the role ('as the seller'), and the context ('for an accepted deal'). It distinguishes from sibling tools like get_fulfillment, verify_fulfillment, and revoke_fulfillment by focusing on the submission aspect.

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 description indicates when to use the tool: 'for an accepted deal' and that the payload is validated against a schema. While it does not explicitly mention when not to use or list alternatives, the context is clear enough for an agent to infer appropriate usage.

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