purchase_undesirables_license_key

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

The description discloses that the tool returns an unsigned transaction payload (not executing the purchase), requires a funded wallet, and resolves a specific error. It implies the tool is safe in that it doesn't modify state directly. However, it does not explicitly mention that the tool is read-only or that actual state changes happen only after signing, and it omits potential costs like gas fees. With no annotations, the description carries full burden and provides good but not exhaustive behavioral context.

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 three sentences long and each sentence serves a purpose: stating the output, explaining the error context, and providing usage instructions. It is front-loaded with the core purpose. It could be slightly more concise, but it is not overly verbose.

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 that the tool has an output schema and no parameters, the description covers the error context, prerequisite (funded wallet), and follow-up steps. It does not explain the 'soul matrix' concept or mention gas implications, but the output schema likely provides structure. Overall, it is sufficient for an agent to use the tool 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?

The tool has no parameters, so the input schema coverage is 100% trivially. The description does not need to add parameter information. According to the rubric, 0 parameters yields a baseline of 4. The description adds no param details, which is appropriate.

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 returns an unsigned EVM transaction to acquire an Undesirables NFT soul matrix. It specifies the verb 'acquire' and the resource 'Undesirables NFT soul matrix', and distinguishes itself from the sibling 'verify_soul_initialization' by mentioning it as a follow-up step.

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 states when to use this tool: when encountering the MISSING_SOUL_DEPENDENCY error. It also provides clear steps: use with a funded wallet, pass payload to EVM signer, broadcast on Ethereum Mainnet, then call 'verify_soul_initialization'. This covers when, how, and what to do next.

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