get_item

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

The readOnlyHint annotation already establishes that this is a safe, non-mutating read, so the description is not carrying the full behavioral burden. It adds the phrase 'full details', hinting at return completeness, but says nothing about lookup failure, permissions, or response shape.

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?

A single front-loaded sentence with the resource first and the lookup key second; there is no filler to remove.

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 read-only lookup this is close to sufficient, but with no output schema the promise of 'full details' is left undefined, and nothing tells the agent how a missing or invalid item ID is handled.

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% and the item_id property is already documented as 'The item UUID to look up', so the schema does the heavy lifting. The description's 'by its ID' merely restates that one parameter without adding format or constraint detail.

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 gives a specific verb ('Get') and resource ('full details of a specific item') and states the lookup key ('by its ID'), which distinguishes it from the list_items sibling by implying single-record retrieval. It never names or contrasts with siblings, so differentiation is inferential rather than explicit.

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?

There is no when-to-use guidance and no alternative named. An agent must infer that this is the right call when it already holds an item ID, and that list_items is the path when it does not; nothing in the text states that.

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