Update release

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

Annotations already establish readOnly=false, idempotent=false, and destructive=false, so the description only needs to add behavioral context. It adds 'metadata or assets' and 'existing release,' but it does not explain side effects, auth requirements, or the fact that asset updates are not represented in the input schema. No contradiction with annotations is present.

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 a single direct sentence that is front-loaded and contains no filler. Every word carries meaning, and it is appropriately sized for a simple update operation.

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 6-parameter tool with only 17% schema description coverage, one generic sentence is insufficient. It omits required parameter behavior, which fields are updatable, how the target release is identified, and the distinction between this tool and update_release_asset_link. The output schema helps with return values but does not compensate for the missing invocation and selection guidance.

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 only 17% (just the project parameter), and the description adds almost no parameter-level detail beyond the general term 'metadata.' It does not explain the required tag_name, the released_at datetime format, milestones semantics, or how the release is identified, and it mentions 'assets' which are not in the 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?

The description clearly states the action ('Update') and resource ('existing GitLab release'), and the tool name reinforces this. However, mentioning 'assets' creates potential ambiguity with the sibling update_release_asset_link, and the description does not explicitly delimit release-level metadata updates from asset-link updates.

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?

The word 'existing' implicitly suggests this tool is for already-created releases rather than creation, but there is no explicit guidance on when to choose this over create_release, delete_release, or update_release_asset_link. It also lacks exclusions or prerequisites beyond what the schema implies.

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