update_release_label

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

With no annotations, the description carries the burden. It discloses the partial-update behavior ('Only the fields you pass are changed') and the return value. However, it does not mention error conditions, preconditions (e.g., label must exist), or permissions, which would be useful for a mutation tool.

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 compact and well-structured: a one-sentence summary, a bulleted Args list, and a Returns line. There is no redundancy or fluff; every sentence contributes useful information.

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 four-parameter update with no enums or nested objects, the description covers the essential action, partial-update semantics, and return type. It could elaborate on failure modes, but given the simplicity and existence of an output schema, it is nearly complete.

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%, so the description fully compensates by documenting all four parameters: label_id as UUID, name as label name, color as hex example, and sort_order as palette position. This adds meaningful semantics beyond the raw 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 starts with 'Update a release label in the palette,' which uses a specific verb and resource, clearly distinguishing it from sibling tools like create_release_label, delete_release_label, and manage_release_labels.

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?

It clearly states that only the fields passed are changed, implying partial updates, but it does not explicitly mention when to use this tool versus create_or_delete, nor does it name alternatives. The context is clear enough for an agent to infer usage.

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