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

The annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds two genuine pieces of context: the required auth scope (database:read) and the returned fields. It does not define "recent" (no window or row limit) or say whether results are ordered or paginated, which is the main behavioral gap.

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, front-loaded sentences with no filler: what you get, then the access scope. It is on the telegraphic side and could spend one more clause on the recency window, but nothing is wasted.

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, four-parameter tool with full schema coverage and no output schema, the description supplies the essentials: the subject (one job), the returned fields, and the permission scope. The only meaningful omission is what "recent" bounds, which would matter for interpreting results.

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%, including defaults for branch, project_id and organization_id, so the schema already carries parameter meaning. The description only reinforces that `name` selects a single job; it adds no syntax or resolution detail beyond the schema, so 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?

"Recent runs of one job" states a concrete resource and scope, and the field list (when, duration, status, message) makes the payload clear. It is distinguishable from schedule.run (which triggers a run) and schedule.list (which lists schedules), though it never names those siblings explicitly.

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: the phrase "one job" signals that this is a per-schedule inspection call, so an agent can infer it is the follow-up to schedule.run. There is no explicit when-to-use or when-not-to-use guidance, and no mention of alternatives such as logs.get or schedule.list for other diagnostic needs.

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