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

With no annotations provided, the description carries the burden for behavioral disclosure. It only says 'create' but does not state side effects (e.g., whether the plan becomes active, if a default is set, whether server pricing changes), return values, or required authentication beyond the schema. This is a significant gap for a mutating tool.

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 no fluff or redundancy. It clearly conveys the core purpose. While it is minimal, that is a content issue, not a conciseness issue; it earns top marks for brevity and clarity.

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?

The description plus the complete schema gives a usable definition for understanding what the tool does and what parameters are needed. However, with no output schema and no behavioral annotations, the description alone does not fully cover execution context, return values, or failure scenarios. It is adequate but not complete.

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 provides descriptions for 100% of the parameters, so the schema itself already documents semantics. The description does not add further meaning, but with full coverage, a baseline of 3 is appropriate.

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 states the action ('Create') and the object ('a pricing plan') with the target context ('for a server'), immediately distinguishing it from sibling tools like update_plan, list_plans, and create_server.

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?

There is no guidance on when to use this tool compared to update_plan or list_plans. It doesn't mention prerequisites such as the server already existing or whether an API key is required. Only the tool name and the verb imply its use case.

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