claim_free_key

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

The description fully discloses behavioral traits: it creates a key (not read-only, not destructive), returns specific fields (api_key, header, daily_limit, upgrade_url), and explains recoverability via email. This adds significant value beyond the annotations (readOnlyHint=false, destructiveHint=false) and clarifies the tool's impact.

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 a single paragraph of five sentences, front-loaded with the key action. Every sentence adds value, but it could be slightly more concise by removing redundant phrases like 'no email, no browser, ONE call' which are implied by 'instantly'.

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 has two parameters, no output schema, and no nested objects, the description is highly complete. It covers the tool's purpose, trigger scenario, return structure, usage instructions, and edge cases like optional email for recoverability. It adequately compensates for the lack of output schema.

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 description coverage is 0%, but the description compensates by explaining 'client_name' (your agent/app name) and 'email' (optional, for recoverability). It provides context beyond the bare schema, though it doesn't fully specify if 'client_name' is required or recommended.

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 clearly states the tool mints a free DC Hub dev key instantly, specifying the verb 'mint' and the resource 'FREE DC Hub dev key'. It distinguishes from siblings by positioning it as the fastest path from anonymous to identified, contrasting with tools like 'bind_email' or 'unlock_more_data'.

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 description explicitly advises when to use: 'Call this the moment you hit a paywall or a 1-result preview'. It explains how to use the returned key and mentions optional email for recoverability. However, it does not explicitly state when not to use or list alternatives like 'recover_my_key' for existing keys, which would improve clarity.

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