create_bridge_wallet_challenge

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

With no annotations provided, the description carries the full burden and does so thoroughly: it discloses that the server cannot sign, the message must be signed externally, the message is opaque and must be echoed verbatim, the nonce is informational, the challenge is not single-use, and calling it changes no state. It also explains the 503 condition and auth requirement.

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 dense but every sentence earns its place—it covers purpose, signing method, opaque message handling, nonce clarification, single-use myth, safety, error handling, and auth. It front-loads the core purpose and flows logically without repetition or fluff.

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 there is no output schema, the description fully explains the return values (message, expires_at) and how to use them (sign externally, pass to register_bridge_wallet). It also covers error conditions and auth, making it complete for an agent to call 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 schema already fully describes the address parameter (100% coverage), setting a baseline of 3. The description adds value by explaining that you must control the key and that step 2 proves it, reinforcing the parameter's purpose beyond the schema's literal definition.

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 explicitly states it is Step 1 of registering a withdrawal wallet, returns the exact message to sign and its expiry, and differentiates itself from the sibling register_bridge_wallet by naming it as the next step. This leaves no ambiguity about what the tool does.

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?

It gives explicit usage guidance: call this before deciding to register (safe due to no state change), then pass the result to register_bridge_wallet. It also explains the 503 error means registration is off and retrying won't help, effectively telling when NOT to use it.

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