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

With no annotations, the description carries the full behavioral burden and does disclose key traits: the nonce is single-use with a short TTL and must not be reused across calls. It omits auth requirements and rate limits, but the critical nonce-lifetime semantics are covered.

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?

Purpose and sequencing are front-loaded in the first sentence, with the nonce-freshness caveat parenthetically attached where relevant. Efficient overall, though the args block restates the single parameter at some length.

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 one-parameter, no-annotation tool with an output schema, the description covers purpose, ordering in the flow, and nonce lifetime, so return values need no explanation. Minor gaps remain on auth/rate-limit behavior, but nothing blocks correct invocation.

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 0%, so the description must compensate, and it does: it documents the single 'wallet' arg as 'your agent's 0x wallet address on Base', supplying format (0x) and chain (Base) context the schema lacks.

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 states a specific verb and resource ('Get a one-time nonce + message to sign') and situates it in the Wicked Identity flow, making it clearly distinguishable from siblings like identity_register and identity_get_challenge. An agent knows exactly what this tool produces without opening the schema.

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 explicitly positions the tool as 'the first step before identity_register, identity_get_challenge, or identity_submit_response' and warns each needs a fresh nonce. This gives clear when-to-use context and names the related tools, though it stops short of explicit when-not or alternative-selection guidance.

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