set_api_key

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

With no annotations provided, the description carries the full burden. It states that it sets the API key and returns a confirmation message, which is basic behavior. However, it does not disclose whether the key is persisted, overwritten on subsequent calls, or held only in memory, nor does it mention any security implications. For a simple setter, this is adequate but not rich.

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 concise, front-loaded with the purpose, and uses a clean Args/Returns structure. Every sentence adds value with no redundant 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?

Given the tool's simplicity, one parameter, and an output schema (confirmation message), the description covers purpose, authentication context, parameter meaning, and return value. It lacks only minor behavioral details like persistence or session scope, but overall it is complete for typical use.

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 schema has one parameter with 0% description coverage, but the description fully compensates by explaining 'api_key_input' as 'Your HenrikDev API key', adding meaning beyond the parameter name. This is sufficient for the single-parameter case.

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 'Set the API key for Valorant API requests' clearly states the specific verb ('Set') and resource ('API key for Valorant API requests'), which distinguishes it from the sibling tools that all retrieve data. It is immediately understandable.

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 'Required for authentication' indicates that this tool must be used before making other API requests, providing clear usage context. It does not explicitly name alternatives, but the sibling tools are all getters, making this the only setter, so the usage is effectively implied.

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