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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description aligns with them. The description adds no extra behavioral context beyond 'get detailed information,' but for a simple read operation with an output schema, this is acceptable.

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 with no filler. It front-loads the action and resource while incorporating the key parameter information efficiently.

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 one-parameter getter with an output schema and safety annotations, the description is nearly complete. It tells the agent what the tool does and how to target a tag; only explicit guidance about sibling alternatives like list_tags is absent, but that is not a significant gap here.

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 100% for the single tag_id parameter, so the schema already documents it. The description only restates the parameter's purpose ('by its ID') without adding format, constraints, or relationship details.

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 ('Get'), a clear resource ('detailed information about a specific tag'), and the unique identifier ('by its ID'). It is easily distinguished from siblings like list_tags, which enumerate tags, and update_tag, which modifies them.

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 phrase 'by its ID' clearly indicates this tool is for fetching a single known tag rather than listing or creating tags. It does not explicitly name alternatives such as list_tags, but the context is straightforward for an agent with a tag ID.

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