Play manual GitLab job

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

Annotations state readOnlyHint=false, so mutating is allowed; destructiveHint=false so safe. Description adds that it creates/starts a job, and the word 'manual' implies user intervention, which is behavioral context beyond the structured annotations.

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 definition is one concise sentence, leads with the action word, includes the actor (CI job) and is not padded. It is structurally perfect and appropriately sized.

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?

Tool is straightforward with a modest input schema; the description does not describe outputs/returns, failure response, or job result formats, but sibling tools and minimal parameters make it sufficiently chooseable. Not complete output because no output schema, no failure/return values are described.

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 descriptions cover 68% of the parameters: 'project' is described, but 'job_id' relies on the developer's name, and 'job_variables_attributes' (keys/values) has no description. The description adds meaning for project (full path or ID), but it does not compensate for undocumented job variables.

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 uses a specific verb ('Start') with an explicit resource ('manual GitLab CI job') and distinguishes from sibling tools by targeting manual jobs, but it does not list specific sibling alternatives or edge cases.

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?

No explicit usage context is given beyond the imperative to start a manual job. It does not mention when to avoid using this tool or when a sibling would be preferable, leaving the agent to infer applicability from the job name.

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