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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful context that the data is public and restricted to an allow-listed corpus, but does not go much beyond that scope qualifier. No contradiction with annotations.

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 two short sentences, front-loaded with the use case and ending with an explicit exclusion. Every word earns its place; there is no repetition or filler.

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 one-parameter read-only tool with a robust annotation set and an output schema present, the description covers when to use it, what it returns, and what it is not for. A small gap is that it doesn't explain how an agent should identify or format a valid feature name, but this is not a serious omission given the tool's simplicity.

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 0% and the schema only describes 'feature' as a string with length constraints. The description adds meaning by clarifying that the parameter must identify a BetterOff feature from the allow-listed corpus, but it provides no examples, formats, or way to discover valid feature identifiers.

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 states a specific action and resource: retrieving 'public details about one BetterOff feature from the allow-listed corpus.' It also sets a clear boundary by saying not to use it for authenticated product state, which helps distinguish it from the sibling calculator and documentation tools.

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 opens with an explicit 'Use this when...' condition and adds a clear exclusion: 'Do not use it for authenticated product state.' However, it does not name a specific alternative tool to use for that state, so guidance is strong but not fully complete.

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