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

Annotations already declare readOnlyHint=true, so safety is covered; the description adds genuinely useful behavioral context by naming what the response contains (customer, location, owner, appointments summary, dates, price) and the underlying endpoint GET /job/{id}. It does not mention not-found/error behavior or whether the response can be expanded, which keeps it below a 5.

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?

Two short sentences with no filler: the payload summary is front-loaded and the API endpoint follows as secondary reference. Every clause earns its place.

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?

With no output schema, the field enumeration in the description does real work by telling the agent what comes back, which is enough to decide whether this tool or the list variant answers the question. Missing only edge-case behavior such as an unknown id.

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% and the single id parameter is fully documented in the schema (positive integer, the job id). The description adds only the phrase "by id" and no format or sourcing guidance beyond the schema, so the baseline 3 applies.

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 a specific verb and resource ("Get one job by id") and enumerates the returned facets, so it is clearly distinguishable from servicetrade_list_jobs. It stops short of naming the list sibling explicitly, but "one job by id" carries the differentiation.

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?

Usage is only implied: an agent can infer this is the detail fetch after obtaining an id from servicetrade_list_jobs, but the description never says when to prefer this over the list tool or what preconditions exist (e.g., needing a valid id). No exclusions or alternatives are stated.

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