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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so safety is covered without restating it. The description adds useful behavioral context beyond annotations: repositories are returned with their latest build state and failed builds expose a build_id intended for ci_get_build_status. Pagination or rate-limit details are not included, but the output schema helps cover return-shape expectations.

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 two sentences with no filler. The first sentence states the core action, and the second adds only the relevant build_id detail that helps the agent chain to ci_get_build_status.

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?

As a read-only list tool with an output schema and safety annotations, the description is serviceable at a high level. However, it leaves parameter semantics unexplained and does not route the agent between ci_list_repositories and ci_list_failed_builds, so the agent may not know how language/visibility filters or pagination affect 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 0%, and the description provides no parameter-level meaning: the org default, page pagination, language filter, and visibility enum are not explained in prose. The parameter names and defaults give some clues, but the description itself contributes nothing to understanding how these parameters affect the call.

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 states a specific verb and resource: 'List repositories and their latest build state.' It also provides a downstream hint by noting failed builds include a build_id for ci_get_build_status, but it does not explicitly distinguish itself from ci_list_failed_builds, so it stops short of full sibling 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?

There is no explicit when-to-use or when-not-to-use guidance relative to alternatives. The phrase 'Failed builds include a build_id for get_build_status' implies a chaining path to ci_get_build_status, but the description does not tell the agent when to choose ci_list_repositories over ci_list_failed_builds.

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