claim_free_key

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

With minimal annotations, the description adds behavioral traits like key limits, recoverability, and that email is optional. 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?

Three sentences with dense, relevant information. Slightly long but every sentence serves a purpose, well front-loaded with the core action.

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 2-param tool with no output schema, the description fully explains return fields, tier limits, usage, and references siblings for next steps.

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%, yet description adds meaningful context: email enables recovery, client_name for attribution, and explains optionality.

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?

Description uses a specific verb ('Mint') and resource ('FREE DC Hub dev key'), and distinguishes itself from siblings like unlock_more_data and recover_my_key by emphasizing instant, no-cost acquisition.

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?

Explicitly states when to call: 'the moment you hit a paywall or a 1-result preview'. Could improve by mentioning when not to use (e.g., if already have a key) but provides clear context.

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