Create a wallet-auth challenge for ERC-8004 agent registration or management. The wallet owner must sign the returned message locally; MCP does not sign with the wallet.
| Name | Required | Description | Default |
|---|---|---|---|
| chain | Yes | Wallet auth chain | |
| action | No | Session scope to request | |
| payload | No | Optional payload object to bind into the signed challenge | |
| walletAddress | Yes | Wallet address that will sign the challenge |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Since no annotations are provided, the description carries the full burden of behavioral disclosure. It explicitly states that the wallet owner must sign the returned message locally and that MCP does not sign with the wallet, which is a critical behavioral trait. This goes beyond typical descriptions and prevents misuse, though it doesn't detail other potential side effects.
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?
Two sentences, front-loaded with the core action ('Create a wallet-auth challenge'), and no filler. Every clause adds value, especially the behavioral note about MCP not signing.
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?
The tool has no output schema, but the description indicates the tool returns a message to sign ('the returned message'). It covers the essential flow for a challenge-generation tool, though it doesn't explain the full verification sequence. Given the sibling verify_agent_wallet_challenge exists, the description is sufficiently complete.
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 100%, so the baseline is 3. The description adds little beyond the schema: it mentions the challenge context and the local signing requirement, but doesn't elaborate on each parameter. The schema descriptions already explain chain, walletAddress, action, and payload adequately.
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 uses a specific verb ('Create') and clear resource ('wallet-auth challenge for ERC-8004 agent registration or management'). It distinguishes the tool from siblings like verify_agent_wallet_challenge by focusing on challenge creation rather than verification.
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 provides clear context: it is used when a wallet-auth challenge is needed for ERC-8004 agent registration or management. It does not explicitly name alternative tools or state when not to use it, but the usage context is implicit from the phrase 'for ERC-8004 agent registration or management.'
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.
Most tools pair a clear verb with a distinct resource noun, so endpoints, agents, datasets, campaigns, products, and vault operations are generally easy to separate. The main risk is the repeated request_*_payment / *_with_payment pairs and the two create_*_with_payment tools, which are only distinguishable by reading descriptions carefully.
The dominant pattern is verb_noun snake_case, such as list_my_endpoints, update_campaign, and finalize_agent_registration, and the payment/request pairs are consistently named. The vault_* tools use a namespace prefix rather than verb-first names, and vault_how_to_backup breaks the action-oriented convention, so it is not perfectly uniform.
48 tools is a very large MCP surface, well beyond the 25-tool threshold where selection becomes a serious burden. Even though the server spans multiple domains, the count feels excessive for a single agent-facing tool set and should likely be split by domain.
The core endpoint, agent, marketplace, and payment flows are well covered, including creation, updates, stats, and two-phase x402 purchases. However, there is no create_product or delete_product, campaigns lack delete, and there is no way to list previously purchased datasets, leaving notable lifecycle gaps.