get_tag

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

The annotations already provide readOnlyHint, openWorldHint, idempotentHint, and destructiveHint (false), indicating the tool is safe and idempotent. The description adds no additional behavioral context beyond the annotations, such as what happens if the tag is not found or rate limits. With rich annotations, the description does not contradict nor significantly enhance transparency.

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 sentence of four words: 'Fetch a tag by ID.' Every word earns its place, and the key information is front-loaded. It is highly concise with no superfluous content.

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?

The tool is simple with one required parameter and an output schema presumably explaining return values. The description covers the core functionality, though it omits details like error handling (e.g., 404 for missing tag). Given the low complexity and presence of annotations and output schema, the description is nearly complete for an adequate user experience.

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?

The input schema has 0% description coverage for the single integer parameter 'tag_id'. The description does not explain the parameter's meaning, format, or how to obtain it. Baseline is low (<50%), so the description should compensate, but it fails to add any semantic value beyond the parameter name.

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 'Fetch a tag by ID' clearly states the action (fetch) and the resource (tag) along with the key parameter (by ID). It distinguishes well from sibling tools like list_tags (which retrieves all tags) and create_tag (which creates a tag).

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 description does not explicitly mention when to use this tool versus alternatives, such as list_tags for multiple tags or update_tag for modifications. However, for a simple get-by-ID operation, the usage is implied by the tool's name and description. No when-not or usage prerequisites are provided.

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