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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false. The description adds useful behavioral context by listing what job information is returned and naming the REST endpoint, though it does not discuss auth, rate limits, or errors.

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 listing the returned fields, followed by the endpoint. Every element is relevant and there is no wasted text.

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 simple read-only get-by-id tool with annotations and a fully documented parameter, the definition is nearly complete: it identifies the resource, lists key return fields, and gives the endpoint. The main minor gap is lack of any note about invalid or missing ids.

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 100%, and the single job_id parameter is documented in the schema as the Zenbooker id from a list result. The description says 'by id' but adds no further syntax beyond what the schema provides, so baseline 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?

States the specific resource and scope: one job by id, and enumerates the job data returned. It is clearly distinguishable from sibling list_jobs by its singular by-id scope.

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 phrase 'One job by id' gives clear usage context: call this when a job id is known. It does not explicitly name alternatives such as zenbooker_list_jobs, but the use case is unambiguous for a get-by-id tool.

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