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

Annotations already declare readOnly, non-destructive, and closed-world, so the safety profile is covered. The description adds the meaningful constraint that only 'public' catalog expressions are reachable, but says nothing about return shape, failure behavior for missing ids, or privacy filtering.

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 verb and resource first and the id/path alternatives compactly appended. No filler, though the embedded path template is slightly dense.

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?

Simple single-parameter read tool with full annotation coverage, 100% schema description coverage, and no output schema to explain. The description plus structured fields give an agent everything needed to call it correctly.

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%, which sets a baseline of 3, but the description adds real meaning by spelling out the concrete nested path template distilleries/{id}/brands/{id}/expressions/{id}, which the schema only alludes to as 'nested catalog path'.

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?

States a specific verb (Get) and a specific resource (one public catalog expression), and clarifies both lookup modes (id or nested path). It is distinguishable from list/search siblings, though it doesn't name the neighboring catalog tools it overlaps with.

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?

Usage is only implied: you fetch a single expression when you have its id. No guidance is given on when to prefer this over search_catalog or explore_catalog, and no exclusions or prerequisites are stated.

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