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

With no annotations, the description carries the full behavioral burden. It usefully discloses that the tool is non-executing and establishes no finance/send action, business preflight, or human consent, which is meaningful safety context. However, it does not clarify authentication needs, what the preview contains, or whether any state is read or persisted beyond the schema preview.

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?

It is a single front-loaded sentence with no filler, so it is concise. But the phrasing is jargon-heavy and the key concept ('historical JSON-schema preview') is not unpacked, making brevity come at the cost of 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?

An output schema exists, so return values need not be explained. But for a tool with five completely undocumented parameters and three similarly named sibling tools, the description is too thin to support correct selection and invocation.

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 0% across five parameters, including required operation_key and company_name plus body, query, and path_parameters. The description explains none of them, so an agent has no semantic meaning for the required inputs or the optional request-shaping objects.

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 says it is a 'historical JSON-schema preview' and non-executing, which hints at inspection rather than mutation. But it never states plainly that it previews a Nextesy operation identified by operation_key/company_name, and it does nothing to distinguish itself from siblings like describe_nextesy_operation, read_nextesy_operation, or find_nextesy_operations.

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 'NON-EXECUTING' warning gives a safety cue, but there is no explicit guidance on when to use this versus describe_nextesy_operation or read_nextesy_operation. An agent is left to infer the selection criteria from the name alone.

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