validate_ci_lint

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

Beyond the readOnlyHint annotation, the description adds concrete error behavior: missing resources, invalid identifiers, insufficient permission, and rate limits are returned as errors. It also asserts that the tool 'does not mutate GitLab data,' which is consistent with and reinforces the readOnlyHint rather than contradicting it.

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?

Three sentences with the core purpose front-loaded in the first sentence. The text is compact and useful overall, though the final sentence introduces redundancy and a slightly distracting group_id/pagination reference.

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 five-parameter, read-only validation tool with no output schema, the description covers the essential context: the validation workflow, error behavior, read-only semantics, and identifier usage. The main gap is that it does not describe the shape of a successful validation response, but the purpose of the tool makes the return role largely inferable.

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%, so every parameter is already documented and the baseline is 3. The description's advice about numeric IDs or URL-encoded project paths largely repeats the schema's project_id description, and the mentions of group_id and pagination fields are confusing because neither appears in this input schema.

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: it validates GitLab CI/CD YAML content for a project. The description clearly distinguishes this from create/update tools by emphasizing validation without applying, but it does not explicitly differentiate it from the closely named sibling 'validate_project_ci_lint', so an agent must infer the difference from the 'content' parameter.

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?

Explicitly provides a validation-first workflow: 'Use this to check configuration without applying it; choose a create or update tool only after validation succeeds.' This tells the agent when the tool fits in the sequence. However, it does not give exclusions or explicitly compare against the sibling validate_project_ci_lint, so the routing guidance is strong but not fully exhaustive.

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