create_custom_fulfillment_service

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only states the action 'create'. It does not mention side effects, permissions, uniqueness constraints on the handle, or what response the caller should expect, leaving the agent uncertain about the operation's implications.

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 a single, front-loaded sentence with zero filler. It communicates the essential purpose efficiently 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?

Despite the schema covering parameters, the description lacks necessary operational context: it does not state what the tool returns (no output schema exists), any post-creation effects, or how it fits into the broader fulfillment workflow. This is insufficient for a non-trivial create operation with 8 parameters and no annotations.

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 input schema comprehensively describes all 8 parameters, so the description does not need to elaborate on them. The description itself adds no parameter-level detail, but the high schema coverage (100%) keeps this at the baseline acceptable level.

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 'Create a new custom fulfillment service' clearly names the action (create) and the specific resource (custom fulfillment service), distinguishing it from sibling tools like update_custom_fulfillment_service and delete_custom_fulfillment_service. It is a precise, unambiguous statement of the tool's core function.

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?

No guidance is provided on when to use this tool versus alternatives such as create_fulfillment or get_custom_fulfillment_services. There is no mention of prerequisites, exclusions, or contexts where this tool is appropriate.

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